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6
doc/manual/src/command-ref/nix-build.md
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@ -55,17 +55,17 @@ All options not listed here are passed to
[`nix-store --realise`](nix-store/realise.md), [`nix-store --realise`](nix-store/realise.md),
except for `--arg` and `--attr` / `-A` which are passed to [`nix-instantiate`](nix-instantiate.md). except for `--arg` and `--attr` / `-A` which are passed to [`nix-instantiate`](nix-instantiate.md).
- <span id="opt-no-out-link">[`--no-out-link`](#opt-no-out-link)<span> - <span id="opt-no-out-link">[`--no-out-link`](#opt-no-out-link)<span>
Do not create a symlink to the output path. Note that as a result Do not create a symlink to the output path. Note that as a result
the output does not become a root of the garbage collector, and so the output does not become a root of the garbage collector, and so
might be deleted by `nix-store --gc`. might be deleted by `nix-store --gc`.
- <span id="opt-dry-run">[`--dry-run`](#opt-dry-run)</span> - <span id="opt-dry-run">[`--dry-run`](#opt-dry-run)</span>
Show what store paths would be built or downloaded. Show what store paths would be built or downloaded.
- <span id="opt-out-link">[`--out-link`](#opt-out-link)</span> / `-o` *outlink* - <span id="opt-out-link">[`--out-link`](#opt-out-link)</span> / `-o` *outlink*
Change the name of the symlink to the output path created from Change the name of the symlink to the output path created from
`result` to *outlink*. `result` to *outlink*.

18
doc/manual/src/command-ref/nix-channel.md
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@ -27,7 +27,8 @@ The moving parts of channels are:
This command has the following operations: This command has the following operations:
- `--add` *url* \[*name*\]\ - `--add` *url* \[*name*\]
Add a channel *name* located at *url* to the list of subscribed channels. Add a channel *name* located at *url* to the list of subscribed channels.
If *name* is omitted, default to the last component of *url*, with the suffixes `-stable` or `-unstable` removed. If *name* is omitted, default to the last component of *url*, with the suffixes `-stable` or `-unstable` removed.
@ -39,17 +40,21 @@ This command has the following operations:
A channel URL must point to a directory containing a file `nixexprs.tar.gz`. A channel URL must point to a directory containing a file `nixexprs.tar.gz`.
At the top level, that tarball must contain a single directory with a `default.nix` file that serves as the channel’s entry point. At the top level, that tarball must contain a single directory with a `default.nix` file that serves as the channel’s entry point.
- `--remove` *name*\ - `--remove` *name*
Remove the channel *name* from the list of subscribed channels. Remove the channel *name* from the list of subscribed channels.
- `--list`\ - `--list`
Print the names and URLs of all subscribed channels on standard output. Print the names and URLs of all subscribed channels on standard output.
- `--update` \[*names*…\]\ - `--update` \[*names*…\]
Download the Nix expressions of subscribed channels and create a new generation. Download the Nix expressions of subscribed channels and create a new generation.
Update all channels if none is specified, and only those included in *names* otherwise. Update all channels if none is specified, and only those included in *names* otherwise.
- `--list-generations`\ - `--list-generations`
Prints a list of all the current existing generations for the Prints a list of all the current existing generations for the
channel profile. channel profile.
@ -58,7 +63,8 @@ This command has the following operations:
nix-env --profile /nix/var/nix/profiles/per-user/$USER/channels --list-generations nix-env --profile /nix/var/nix/profiles/per-user/$USER/channels --list-generations
``` ```
- `--rollback` \[*generation*\]\ - `--rollback` \[*generation*\]
Revert channels to the state before the last call to `nix-channel --update`. Revert channels to the state before the last call to `nix-channel --update`.
Optionally, you can specify a specific channel *generation* number to restore. Optionally, you can specify a specific channel *generation* number to restore.

6
doc/manual/src/command-ref/nix-collect-garbage.md
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@ -48,12 +48,14 @@ Instead, it looks in a few locations, and acts on all profiles it finds there:
These options are for deleting old [profiles] prior to deleting unreachable [store objects]. These options are for deleting old [profiles] prior to deleting unreachable [store objects].
- <span id="opt-delete-old">[`--delete-old`](#opt-delete-old)</span> / `-d`\ - <span id="opt-delete-old">[`--delete-old`](#opt-delete-old)</span> / `-d`
Delete all old generations of profiles. Delete all old generations of profiles.
This is the equivalent of invoking [`nix-env --delete-generations old`](@docroot@/command-ref/nix-env/delete-generations.md#generations-old) on each found profile. This is the equivalent of invoking [`nix-env --delete-generations old`](@docroot@/command-ref/nix-env/delete-generations.md#generations-old) on each found profile.
- <span id="opt-delete-older-than">[`--delete-older-than`](#opt-delete-older-than)</span> *period*\ - <span id="opt-delete-older-than">[`--delete-older-than`](#opt-delete-older-than)</span> *period*
Delete all generations of profiles older than the specified amount (except for the generations that were active at that point in time). Delete all generations of profiles older than the specified amount (except for the generations that were active at that point in time).
*period* is a value such as `30d`, which would mean 30 days. *period* is a value such as `30d`, which would mean 30 days.

12
doc/manual/src/command-ref/nix-copy-closure.md
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@ -27,26 +27,26 @@ When using public key authentication, you can avoid typing the passphrase with `
# Options # Options
- `--to` - `--to`
Copy the closure of _paths_ from a Nix store accessible from the local machine to the Nix store on the remote _machine_. Copy the closure of _paths_ from a Nix store accessible from the local machine to the Nix store on the remote _machine_.
This is the default behavior. This is the default behavior.
- `--from` - `--from`
Copy the closure of _paths_ from the Nix store on the remote _machine_ to the local machine's specified Nix store. Copy the closure of _paths_ from the Nix store on the remote _machine_ to the local machine's specified Nix store.
- `--gzip` - `--gzip`
Enable compression of the SSH connection. Enable compression of the SSH connection.
- `--include-outputs` - `--include-outputs`
Also copy the outputs of [store derivation]s included in the closure. Also copy the outputs of [store derivation]s included in the closure.
[store derivation]: @docroot@/glossary.md#gloss-store-derivation [store derivation]: @docroot@/glossary.md#gloss-store-derivation
- `--use-substitutes` / `-s` - `--use-substitutes` / `-s`
Attempt to download missing store objects on the target from [substituters](@docroot@/command-ref/conf-file.md#conf-substituters). Attempt to download missing store objects on the target from [substituters](@docroot@/command-ref/conf-file.md#conf-substituters).
Any store objects that cannot be substituted on the target are still copied normally from the source. Any store objects that cannot be substituted on the target are still copied normally from the source.
@ -56,7 +56,7 @@ When using public key authentication, you can avoid typing the passphrase with `
# Environment variables # Environment variables
- `NIX_SSHOPTS` - `NIX_SSHOPTS`
Additional options to be passed to `ssh` on the command line. Additional options to be passed to `ssh` on the command line.

9
doc/manual/src/command-ref/nix-env/delete-generations.md
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@ -12,7 +12,8 @@ This operation deletes the specified generations of the current profile.
*generations* can be a one of the following: *generations* can be a one of the following:
- <span id="generations-list">[`<number>...`](#generations-list)</span>:\ - <span id="generations-list">[`<number>...`](#generations-list)</span>
A list of generation numbers, each one a separate command-line argument. A list of generation numbers, each one a separate command-line argument.
Delete exactly the profile generations given by their generation number. Delete exactly the profile generations given by their generation number.
@ -30,7 +31,8 @@ This operation deletes the specified generations of the current profile.
> Because one can roll back to a previous generation, it is possible to have generations newer than the current one. > Because one can roll back to a previous generation, it is possible to have generations newer than the current one.
> They will also be deleted. > They will also be deleted.
- <span id="generations-time">[`<number>d`](#generations-time)</span>:\ - <span id="generations-time">[`<number>d`](#generations-time)</span>
The last *number* days The last *number* days
*Example*: `30d` *Example*: `30d`
@ -38,7 +40,8 @@ This operation deletes the specified generations of the current profile.
Delete all generations created more than *number* days ago, except the most recent one of them. Delete all generations created more than *number* days ago, except the most recent one of them.
This allows rolling back to generations that were available within the specified period. This allows rolling back to generations that were available within the specified period.
- <span id="generations-count">[`+<number>`](#generations-count)</span>:\ - <span id="generations-count">[`+<number>`](#generations-count)</span>
The last *number* generations up to the present The last *number* generations up to the present
*Example*: `+5` *Example*: `+5`

3
doc/manual/src/command-ref/nix-env/env-common.md
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@ -1,6 +1,7 @@
# Environment variables # Environment variables
- `NIX_PROFILE`\ - `NIX_PROFILE`
Location of the Nix profile. Defaults to the target of the symlink Location of the Nix profile. Defaults to the target of the symlink
`~/.nix-profile`, if it exists, or `/nix/var/nix/profiles/default` `~/.nix-profile`, if it exists, or `/nix/var/nix/profiles/default`
otherwise. otherwise.

20
doc/manual/src/command-ref/nix-env/install.md
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@ -21,7 +21,7 @@ It is based on the current generation of the active [profile](@docroot@/command-
The arguments *args* map to store paths in a number of possible ways: The arguments *args* map to store paths in a number of possible ways:
- By default, *args* is a set of [derivation] names denoting derivations in the [default Nix expression]. - By default, *args* is a set of [derivation] names denoting derivations in the [default Nix expression].
These are [realised], and the resulting output paths are installed. These are [realised], and the resulting output paths are installed.
Currently installed derivations with a name equal to the name of a derivation being added are removed unless the option `--preserve-installed` is specified. Currently installed derivations with a name equal to the name of a derivation being added are removed unless the option `--preserve-installed` is specified.
@ -44,7 +44,7 @@ The arguments *args* map to store paths in a number of possible ways:
gcc-3.3.6 gcc-4.1.1` will install both version of GCC (and will gcc-3.3.6 gcc-4.1.1` will install both version of GCC (and will
probably cause a user environment conflict\!). probably cause a user environment conflict\!).
- If [`--attr`](#opt-attr) / `-A` is specified, the arguments are *attribute paths* that select attributes from the [default Nix expression]. - If [`--attr`](#opt-attr) / `-A` is specified, the arguments are *attribute paths* that select attributes from the [default Nix expression].
This is faster than using derivation names and unambiguous. This is faster than using derivation names and unambiguous.
Show the attribute paths of available packages with [`nix-env --query`](./query.md): Show the attribute paths of available packages with [`nix-env --query`](./query.md):
@ -52,20 +52,20 @@ The arguments *args* map to store paths in a number of possible ways:
nix-env --query --available --attr-path nix-env --query --available --attr-path
``` ```
- If `--from-profile` *path* is given, *args* is a set of names - If `--from-profile` *path* is given, *args* is a set of names
denoting installed [store paths] in the profile *path*. This is an denoting installed [store paths] in the profile *path*. This is an
easy way to copy user environment elements from one profile to easy way to copy user environment elements from one profile to
another. another.
- If `--from-expression` is given, *args* are [Nix language functions](@docroot@/language/constructs.md#functions) that are called with the [default Nix expression] as their single argument. - If `--from-expression` is given, *args* are [Nix language functions](@docroot@/language/constructs.md#functions) that are called with the [default Nix expression] as their single argument.
The derivations returned by those function calls are installed. The derivations returned by those function calls are installed.
This allows derivations to be specified in an unambiguous way, which is necessary if there are multiple derivations with the same name. This allows derivations to be specified in an unambiguous way, which is necessary if there are multiple derivations with the same name.
- If *args* are [store derivations](@docroot@/glossary.md#gloss-store-derivation), then these are [realised], and the resulting output paths are installed. - If *args* are [store derivations](@docroot@/glossary.md#gloss-store-derivation), then these are [realised], and the resulting output paths are installed.
- If *args* are [store paths] that are not store derivations, then these are [realised] and installed. - If *args* are [store paths] that are not store derivations, then these are [realised] and installed.
- By default all [outputs](@docroot@/language/derivations.md#attr-outputs) are installed for each [derivation]. - By default all [outputs](@docroot@/language/derivations.md#attr-outputs) are installed for each [derivation].
This can be overridden by adding a `meta.outputsToInstall` attribute on the derivation listing a subset of the output names. This can be overridden by adding a `meta.outputsToInstall` attribute on the derivation listing a subset of the output names.
Example: Example:
@ -119,14 +119,14 @@ The arguments *args* map to store paths in a number of possible ways:
# Options # Options
- `--prebuilt-only` / `-b` - `--prebuilt-only` / `-b`
Use only derivations for which a substitute is registered, i.e., Use only derivations for which a substitute is registered, i.e.,
there is a pre-built binary available that can be downloaded in lieu there is a pre-built binary available that can be downloaded in lieu
of building the derivation. Thus, no packages will be built from of building the derivation. Thus, no packages will be built from
source. source.
- `--preserve-installed` / `-P` - `--preserve-installed` / `-P`
Do not remove derivations with a name matching one of the Do not remove derivations with a name matching one of the
derivations being installed. Usually, trying to have two versions of derivations being installed. Usually, trying to have two versions of
@ -135,7 +135,7 @@ The arguments *args* map to store paths in a number of possible ways:
clashes between the two versions. However, this is not the case for clashes between the two versions. However, this is not the case for
all packages. all packages.
- `--remove-all` / `-r` - `--remove-all` / `-r`
Remove all previously installed packages first. This is equivalent Remove all previously installed packages first. This is equivalent
to running `nix-env --uninstall '.*'` first, except that everything happens to running `nix-env --uninstall '.*'` first, except that everything happens

15
doc/manual/src/command-ref/nix-env/opt-common.md
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@ -2,7 +2,8 @@
The following options are allowed for all `nix-env` operations, but may not always have an effect. The following options are allowed for all `nix-env` operations, but may not always have an effect.
- `--file` / `-f` *path*\ - `--file` / `-f` *path*
Specifies the Nix expression (designated below as the *active Nix Specifies the Nix expression (designated below as the *active Nix
expression*) used by the `--install`, `--upgrade`, and `--query expression*) used by the `--install`, `--upgrade`, and `--query
--available` operations to obtain derivations. The default is --available` operations to obtain derivations. The default is
@ -13,13 +14,15 @@ The following options are allowed for all `nix-env` operations, but may not alwa
unpacked to a temporary location. The tarball must include a single unpacked to a temporary location. The tarball must include a single
top-level directory containing at least a file named `default.nix`. top-level directory containing at least a file named `default.nix`.
- `--profile` / `-p` *path*\ - `--profile` / `-p` *path*
Specifies the profile to be used by those operations that operate on Specifies the profile to be used by those operations that operate on
a profile (designated below as the *active profile*). A profile is a a profile (designated below as the *active profile*). A profile is a
sequence of user environments called *generations*, one of which is sequence of user environments called *generations*, one of which is
the *current generation*. the *current generation*.
- `--dry-run`\ - `--dry-run`
For the `--install`, `--upgrade`, `--uninstall`, For the `--install`, `--upgrade`, `--uninstall`,
`--switch-generation`, `--delete-generations` and `--rollback` `--switch-generation`, `--delete-generations` and `--rollback`
operations, this flag will cause `nix-env` to print what *would* be operations, this flag will cause `nix-env` to print what *would* be
@ -29,7 +32,7 @@ The following options are allowed for all `nix-env` operations, but may not alwa
[substituted](@docroot@/glossary.md) (i.e., downloaded) and which paths [substituted](@docroot@/glossary.md) (i.e., downloaded) and which paths
will be built from source (because no substitute is available). will be built from source (because no substitute is available).
- `--system-filter` *system*\ - `--system-filter` *system*
By default, operations such as `--query
--available` show derivations matching any platform. This option By default, operations such as `--query --available` show derivations matching any platform. This option
allows you to use derivations for the specified platform *system*. allows you to use derivations for the specified platform *system*.

54
doc/manual/src/command-ref/nix-env/query.md
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@ -35,11 +35,13 @@ The derivations are sorted by their `name` attributes.
The following flags specify the set of things on which the query The following flags specify the set of things on which the query
operates. operates.
- `--installed`\ - `--installed`
The query operates on the store paths that are installed in the The query operates on the store paths that are installed in the
current generation of the active profile. This is the default. current generation of the active profile. This is the default.
- `--available`; `-a`\ - `--available` / `-a`
The query operates on the derivations that are available in the The query operates on the derivations that are available in the
active Nix expression. active Nix expression.
@ -50,24 +52,28 @@ selected derivations. Multiple flags may be specified, in which case the
information is shown in the order given here. Note that the name of the information is shown in the order given here. Note that the name of the
derivation is shown unless `--no-name` is specified. derivation is shown unless `--no-name` is specified.
- `--xml`\ - `--xml`
Print the result in an XML representation suitable for automatic Print the result in an XML representation suitable for automatic
processing by other tools. The root element is called `items`, which processing by other tools. The root element is called `items`, which
contains a `item` element for each available or installed contains a `item` element for each available or installed
derivation. The fields discussed below are all stored in attributes derivation. The fields discussed below are all stored in attributes
of the `item` elements. of the `item` elements.
- `--json`\ - `--json`
Print the result in a JSON representation suitable for automatic Print the result in a JSON representation suitable for automatic
processing by other tools. processing by other tools.
- `--prebuilt-only` / `-b`\ - `--prebuilt-only` / `-b`
Show only derivations for which a substitute is registered, i.e., Show only derivations for which a substitute is registered, i.e.,
there is a pre-built binary available that can be downloaded in lieu there is a pre-built binary available that can be downloaded in lieu
of building the derivation. Thus, this shows all packages that of building the derivation. Thus, this shows all packages that
probably can be installed quickly. probably can be installed quickly.
- `--status`; `-s`\ - `--status` / `-s`
Print the *status* of the derivation. The status consists of three Print the *status* of the derivation. The status consists of three
characters. The first is `I` or `-`, indicating whether the characters. The first is `I` or `-`, indicating whether the
derivation is currently installed in the current generation of the derivation is currently installed in the current generation of the
@ -78,49 +84,61 @@ derivation is shown unless `--no-name` is specified.
derivation to be built. The third is `S` or `-`, indicating whether derivation to be built. The third is `S` or `-`, indicating whether
a substitute is available for the derivation. a substitute is available for the derivation.
- `--attr-path`; `-P`\ - `--attr-path` / `-P`
Print the *attribute path* of the derivation, which can be used to Print the *attribute path* of the derivation, which can be used to
unambiguously select it using the `--attr` option available in unambiguously select it using the `--attr` option available in
commands that install derivations like `nix-env --install`. This commands that install derivations like `nix-env --install`. This
option only works together with `--available` option only works together with `--available`
- `--no-name`\ - `--no-name`
Suppress printing of the `name` attribute of each derivation. Suppress printing of the `name` attribute of each derivation.
- `--compare-versions` / `-c`\ - `--compare-versions` / `-c`
Compare installed versions to available versions, or vice versa (if Compare installed versions to available versions, or vice versa (if
`--available` is given). This is useful for quickly seeing whether `--available` is given). This is useful for quickly seeing whether
upgrades for installed packages are available in a Nix expression. A upgrades for installed packages are available in a Nix expression. A
column is added with the following meaning: column is added with the following meaning:
- `<` *version*\ - `<` *version*
A newer version of the package is available or installed. A newer version of the package is available or installed.
- `=` *version*\ - `=` *version*
At most the same version of the package is available or At most the same version of the package is available or
installed. installed.
- `>` *version*\ - `>` *version*
Only older versions of the package are available or installed. Only older versions of the package are available or installed.
- `- ?`\ - `- ?`
No version of the package is available or installed. No version of the package is available or installed.
- `--system`\ - `--system`
Print the `system` attribute of the derivation. Print the `system` attribute of the derivation.
- `--drv-path`\ - `--drv-path`
Print the path of the [store derivation](@docroot@/glossary.md#gloss-store-derivation). Print the path of the [store derivation](@docroot@/glossary.md#gloss-store-derivation).
- `--out-path`\ - `--out-path`
Print the output path of the derivation. Print the output path of the derivation.
- `--description`\ - `--description`
Print a short (one-line) description of the derivation, if Print a short (one-line) description of the derivation, if
available. The description is taken from the `meta.description` available. The description is taken from the `meta.description`
attribute of the derivation. attribute of the derivation.
- `--meta`\ - `--meta`
Print all of the meta-attributes of the derivation. This option is Print all of the meta-attributes of the derivation. This option is
only available with `--xml` or `--json`. only available with `--xml` or `--json`.

6
doc/manual/src/command-ref/nix-env/set-flag.md
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@ -13,7 +13,7 @@ to be modified. There are several attributes that can be usefully
modified, because they affect the behaviour of `nix-env` or the user modified, because they affect the behaviour of `nix-env` or the user
environment build script: environment build script:
- `priority` can be changed to resolve filename clashes. The user - `priority` can be changed to resolve filename clashes. The user
environment build script uses the `meta.priority` attribute of environment build script uses the `meta.priority` attribute of
derivations to resolve filename collisions between packages. Lower derivations to resolve filename collisions between packages. Lower
priority values denote a higher priority. For instance, the GCC priority values denote a higher priority. For instance, the GCC
@ -23,11 +23,11 @@ environment build script:
priority than Binutils, so the former’s `bin/ld` is symlinked in the priority than Binutils, so the former’s `bin/ld` is symlinked in the
user environment. user environment.
- `keep` can be set to `true` to prevent the package from being - `keep` can be set to `true` to prevent the package from being
upgraded or replaced. This is useful if you want to hang on to an upgraded or replaced. This is useful if you want to hang on to an
older version of a package. older version of a package.
- `active` can be set to `false` to “disable” the package. That is, no - `active` can be set to `false` to “disable” the package. That is, no
symlinks will be generated to the files of the package, but it symlinks will be generated to the files of the package, but it
remains part of the profile (so it won’t be garbage-collected). It remains part of the profile (so it won’t be garbage-collected). It
can be set back to `true` to re-enable the package. can be set back to `true` to re-enable the package.

18
doc/manual/src/command-ref/nix-env/upgrade.md
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@ -28,36 +28,42 @@ version is installed.
# Flags # Flags
- `--lt`\ - `--lt`
Only upgrade a derivation to newer versions. This is the default. Only upgrade a derivation to newer versions. This is the default.
- `--leq`\ - `--leq`
In addition to upgrading to newer versions, also “upgrade” to In addition to upgrading to newer versions, also “upgrade” to
derivations that have the same version. Version are not a unique derivations that have the same version. Version are not a unique
identification of a derivation, so there may be many derivations identification of a derivation, so there may be many derivations
that have the same version. This flag may be useful to force that have the same version. This flag may be useful to force
“synchronisation” between the installed and available derivations. “synchronisation” between the installed and available derivations.
- `--eq`\ - `--eq`
*Only* “upgrade” to derivations that have the same version. This may *Only* “upgrade” to derivations that have the same version. This may
not seem very useful, but it actually is, e.g., when there is a new not seem very useful, but it actually is, e.g., when there is a new
release of Nixpkgs and you want to replace installed applications release of Nixpkgs and you want to replace installed applications
with the same versions built against newer dependencies (to reduce with the same versions built against newer dependencies (to reduce
the number of dependencies floating around on your system). the number of dependencies floating around on your system).
- `--always`\ - `--always`
In addition to upgrading to newer versions, also “upgrade” to In addition to upgrading to newer versions, also “upgrade” to
derivations that have the same or a lower version. I.e., derivations derivations that have the same or a lower version. I.e., derivations
may actually be downgraded depending on what is available in the may actually be downgraded depending on what is available in the
active Nix expression. active Nix expression.
- `--prebuilt-only` / `-b`\ - `--prebuilt-only` / `-b`
Use only derivations for which a substitute is registered, i.e., Use only derivations for which a substitute is registered, i.e.,
there is a pre-built binary available that can be downloaded in lieu there is a pre-built binary available that can be downloaded in lieu
of building the derivation. Thus, no packages will be built from of building the derivation. Thus, no packages will be built from
source. source.
- `--preserve-installed` / `-P`\ - `--preserve-installed` / `-P`
Do not remove derivations with a name matching one of the Do not remove derivations with a name matching one of the
derivations being installed. Usually, trying to have two versions of derivations being installed. Usually, trying to have two versions of
the same package installed in the same generation of a profile will the same package installed in the same generation of a profile will

33
doc/manual/src/command-ref/nix-hash.md
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@ -29,7 +29,8 @@ md5sum`.
# Options # Options
- `--flat`\ - `--flat`
Print the cryptographic hash of the contents of each regular file *path*. Print the cryptographic hash of the contents of each regular file *path*.
That is, instead of computing That is, instead of computing
the hash of the [Nix Archive (NAR)](@docroot@/store/file-system-object/content-address.md#serial-nix-archive) of *path*, the hash of the [Nix Archive (NAR)](@docroot@/store/file-system-object/content-address.md#serial-nix-archive) of *path*,
@ -38,43 +39,53 @@ md5sum`.
The result is identical to that produced by the GNU commands The result is identical to that produced by the GNU commands
`md5sum` and `sha1sum`. `md5sum` and `sha1sum`.
- `--base16`\ - `--base16`
Print the hash in a hexadecimal representation (default). Print the hash in a hexadecimal representation (default).
- `--base32`\ - `--base32`
Print the hash in a base-32 representation rather than hexadecimal. Print the hash in a base-32 representation rather than hexadecimal.
This base-32 representation is more compact and can be used in Nix This base-32 representation is more compact and can be used in Nix
expressions (such as in calls to `fetchurl`). expressions (such as in calls to `fetchurl`).
- `--base64`\ - `--base64`
Similar to --base32, but print the hash in a base-64 representation, Similar to --base32, but print the hash in a base-64 representation,
which is more compact than the base-32 one. which is more compact than the base-32 one.
- `--sri`\ - `--sri`
Print the hash in SRI format with base-64 encoding. Print the hash in SRI format with base-64 encoding.
The type of hash algorithm will be prepended to the hash string, The type of hash algorithm will be prepended to the hash string,
followed by a hyphen (-) and the base-64 hash body. followed by a hyphen (-) and the base-64 hash body.
- `--truncate`\ - `--truncate`
Truncate hashes longer than 160 bits (such as SHA-256) to 160 bits. Truncate hashes longer than 160 bits (such as SHA-256) to 160 bits.
- `--type` *hashAlgo*\ - `--type` *hashAlgo*
Use the specified cryptographic hash algorithm, which can be one of Use the specified cryptographic hash algorithm, which can be one of
`md5`, `sha1`, `sha256`, and `sha512`. `md5`, `sha1`, `sha256`, and `sha512`.
- `--to-base16`\ - `--to-base16`
Don’t hash anything, but convert the base-32 hash representation Don’t hash anything, but convert the base-32 hash representation
*hash* to hexadecimal. *hash* to hexadecimal.
- `--to-base32`\ - `--to-base32`
Don’t hash anything, but convert the hexadecimal hash representation Don’t hash anything, but convert the hexadecimal hash representation
*hash* to base-32. *hash* to base-32.
- `--to-base64`\ - `--to-base64`
Don’t hash anything, but convert the hexadecimal hash representation Don’t hash anything, but convert the hexadecimal hash representation
*hash* to base-64. *hash* to base-64.
- `--to-sri`\ - `--to-sri`
Don’t hash anything, but convert the hexadecimal hash representation Don’t hash anything, but convert the hexadecimal hash representation
*hash* to SRI. *hash* to SRI.

24
doc/manual/src/command-ref/nix-instantiate.md
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@ -30,14 +30,17 @@ standard input.
# Options # Options
- `--add-root` *path*\ - `--add-root` *path*
See the [corresponding option](nix-store.md) in `nix-store`. See the [corresponding option](nix-store.md) in `nix-store`.
- `--parse`\ - `--parse`
Just parse the input files, and print their abstract syntax trees on Just parse the input files, and print their abstract syntax trees on
standard output as a Nix expression. standard output as a Nix expression.
- `--eval`\ - `--eval`
Just parse and evaluate the input files, and print the resulting Just parse and evaluate the input files, and print the resulting
values on standard output. No instantiation of store derivations values on standard output. No instantiation of store derivations
takes place. takes place.
@ -80,14 +83,16 @@ standard input.
> </expr> > </expr>
> ``` > ```
- `--find-file`\ - `--find-file`
Look up the given files in Nix’s search path (as specified by the Look up the given files in Nix’s search path (as specified by the
`NIX_PATH` environment variable). If found, print the corresponding `NIX_PATH` environment variable). If found, print the corresponding
absolute paths on standard output. For instance, if `NIX_PATH` is absolute paths on standard output. For instance, if `NIX_PATH` is
`nixpkgs=/home/alice/nixpkgs`, then `nix-instantiate --find-file `nixpkgs=/home/alice/nixpkgs`, then `nix-instantiate --find-file
nixpkgs/default.nix` will print `/home/alice/nixpkgs/default.nix`. nixpkgs/default.nix` will print `/home/alice/nixpkgs/default.nix`.
- `--strict`\ - `--strict`
When used with `--eval`, recursively evaluate list elements and When used with `--eval`, recursively evaluate list elements and
attributes. Normally, such sub-expressions are left unevaluated attributes. Normally, such sub-expressions are left unevaluated
(since the Nix language is lazy). (since the Nix language is lazy).
@ -97,17 +102,20 @@ standard input.
> This option can cause non-termination, because lazy data > This option can cause non-termination, because lazy data
> structures can be infinitely large. > structures can be infinitely large.
- `--json`\ - `--json`
When used with `--eval`, print the resulting value as an JSON When used with `--eval`, print the resulting value as an JSON
representation of the abstract syntax tree rather than as a Nix expression. representation of the abstract syntax tree rather than as a Nix expression.
- `--xml`\ - `--xml`
When used with `--eval`, print the resulting value as an XML When used with `--eval`, print the resulting value as an XML
representation of the abstract syntax tree rather than as a Nix expression. representation of the abstract syntax tree rather than as a Nix expression.
The schema is the same as that used by the [`toXML` The schema is the same as that used by the [`toXML`
built-in](../language/builtins.md). built-in](../language/builtins.md).
- `--read-write-mode`\ - `--read-write-mode`
When used with `--eval`, perform evaluation in read/write mode so When used with `--eval`, perform evaluation in read/write mode so
nix language features that require it will still work (at the cost nix language features that require it will still work (at the cost
of needing to do instantiation of every evaluated derivation). If of needing to do instantiation of every evaluated derivation). If

15
doc/manual/src/command-ref/nix-prefetch-url.md
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@ -39,23 +39,28 @@ the path of the downloaded file in the Nix store is also printed.
# Options # Options
- `--type` *hashAlgo*\ - `--type` *hashAlgo*
Use the specified cryptographic hash algorithm, Use the specified cryptographic hash algorithm,
which can be one of `md5`, `sha1`, `sha256`, and `sha512`. which can be one of `md5`, `sha1`, `sha256`, and `sha512`.
The default is `sha256`. The default is `sha256`.
- `--print-path`\ - `--print-path`
Print the store path of the downloaded file on standard output. Print the store path of the downloaded file on standard output.
- `--unpack`\ - `--unpack`
Unpack the archive (which must be a tarball or zip file) and add the Unpack the archive (which must be a tarball or zip file) and add the
result to the Nix store. The resulting hash can be used with result to the Nix store. The resulting hash can be used with
functions such as Nixpkgs’s `fetchzip` or `fetchFromGitHub`. functions such as Nixpkgs’s `fetchzip` or `fetchFromGitHub`.
- `--executable`\ - `--executable`
Set the executable bit on the downloaded file. Set the executable bit on the downloaded file.
- `--name` *name*\ - `--name` *name*
Override the name of the file in the Nix store. By default, this is Override the name of the file in the Nix store. By default, this is
`hash-basename`, where *basename* is the last component of *url*. `hash-basename`, where *basename* is the last component of *url*.
Overriding the name is necessary when *basename* contains characters Overriding the name is necessary when *basename* contains characters

24
doc/manual/src/command-ref/nix-shell.md
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@ -60,7 +60,8 @@ All options not listed here are passed to `nix-store
--realise`, except for `--arg` and `--attr` / `-A` which are passed to --realise`, except for `--arg` and `--attr` / `-A` which are passed to
`nix-instantiate`. `nix-instantiate`.
- `--command` *cmd*\ - `--command` *cmd*
In the environment of the derivation, run the shell command *cmd*. In the environment of the derivation, run the shell command *cmd*.
This command is executed in an interactive shell. (Use `--run` to This command is executed in an interactive shell. (Use `--run` to
use a non-interactive shell instead.) However, a call to `exit` is use a non-interactive shell instead.) However, a call to `exit` is
@ -70,34 +71,40 @@ All options not listed here are passed to `nix-store
drop you into the interactive shell. This can be useful for doing drop you into the interactive shell. This can be useful for doing
any additional initialisation. any additional initialisation.
- `--run` *cmd*\ - `--run` *cmd*
Like `--command`, but executes the command in a non-interactive Like `--command`, but executes the command in a non-interactive
shell. This means (among other things) that if you hit Ctrl-C while shell. This means (among other things) that if you hit Ctrl-C while
the command is running, the shell exits. the command is running, the shell exits.
- `--exclude` *regexp*\ - `--exclude` *regexp*
Do not build any dependencies whose store path matches the regular Do not build any dependencies whose store path matches the regular
expression *regexp*. This option may be specified multiple times. expression *regexp*. This option may be specified multiple times.
- `--pure`\ - `--pure`
If this flag is specified, the environment is almost entirely If this flag is specified, the environment is almost entirely
cleared before the interactive shell is started, so you get an cleared before the interactive shell is started, so you get an
environment that more closely corresponds to the “real” Nix build. A environment that more closely corresponds to the “real” Nix build. A
few variables, in particular `HOME`, `USER` and `DISPLAY`, are few variables, in particular `HOME`, `USER` and `DISPLAY`, are
retained. retained.
- `--packages` / `-p` *packages*…\ - `--packages` / `-p` *packages*…
Set up an environment in which the specified packages are present. Set up an environment in which the specified packages are present.
The command line arguments are interpreted as attribute names inside The command line arguments are interpreted as attribute names inside
the Nix Packages collection. Thus, `nix-shell --packages libjpeg openjdk` the Nix Packages collection. Thus, `nix-shell --packages libjpeg openjdk`
will start a shell in which the packages denoted by the attribute will start a shell in which the packages denoted by the attribute
names `libjpeg` and `openjdk` are present. names `libjpeg` and `openjdk` are present.
- `-i` *interpreter*\ - `-i` *interpreter*
The chained script interpreter to be invoked by `nix-shell`. Only The chained script interpreter to be invoked by `nix-shell`. Only
applicable in `#!`-scripts (described below). applicable in `#!`-scripts (described below).
- `--keep` *name*\ - `--keep` *name*
When a `--pure` shell is started, keep the listed environment When a `--pure` shell is started, keep the listed environment
variables. variables.
@ -105,7 +112,8 @@ All options not listed here are passed to `nix-store
# Environment variables # Environment variables
- `NIX_BUILD_SHELL`\ - `NIX_BUILD_SHELL`
Shell used to start the interactive environment. Defaults to the Shell used to start the interactive environment. Defaults to the
`bash` found in `<nixpkgs>`, falling back to the `bash` found in `bash` found in `<nixpkgs>`, falling back to the `bash` found in
`PATH` if not found. `PATH` if not found.

3
doc/manual/src/command-ref/nix-store/add-fixed.md
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@ -16,7 +16,8 @@ public url or broke since the download expression was written.
This operation has the following options: This operation has the following options:
- `--recursive`\ - `--recursive`
Use recursive instead of flat hashing mode, used when adding Use recursive instead of flat hashing mode, used when adding
directories to the store. directories to the store.

12
doc/manual/src/command-ref/nix-store/gc.md
View file

@ -14,18 +14,21 @@ reachable via file system references from a set of “roots”, are deleted.
The following suboperations may be specified: The following suboperations may be specified:
- `--print-roots`\ - `--print-roots`
This operation prints on standard output the set of roots used by This operation prints on standard output the set of roots used by
the garbage collector. the garbage collector.
- `--print-live`\ - `--print-live`
This operation prints on standard output the set of “live” store This operation prints on standard output the set of “live” store
paths, which are all the store paths reachable from the roots. Live paths, which are all the store paths reachable from the roots. Live
paths should never be deleted, since that would break consistency — paths should never be deleted, since that would break consistency —
it would become possible that applications are installed that it would become possible that applications are installed that
reference things that are no longer present in the store. reference things that are no longer present in the store.
- `--print-dead`\ - `--print-dead`
This operation prints out on standard output the set of “dead” store This operation prints out on standard output the set of “dead” store
paths, which is just the opposite of the set of live paths: any path paths, which is just the opposite of the set of live paths: any path
in the store that is not live (with respect to the roots) is dead. in the store that is not live (with respect to the roots) is dead.
@ -33,7 +36,8 @@ The following suboperations may be specified:
By default, all unreachable paths are deleted. The following options By default, all unreachable paths are deleted. The following options
control what gets deleted and in what order: control what gets deleted and in what order:
- `--max-freed` *bytes*\ - `--max-freed` *bytes*
Keep deleting paths until at least *bytes* bytes have been deleted, Keep deleting paths until at least *bytes* bytes have been deleted,
then stop. The argument *bytes* can be followed by the then stop. The argument *bytes* can be followed by the
multiplicative suffix `K`, `M`, `G` or `T`, denoting KiB, MiB, GiB multiplicative suffix `K`, `M`, `G` or `T`, denoting KiB, MiB, GiB

48
doc/manual/src/command-ref/nix-store/query.md
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@ -24,25 +24,29 @@ symlink.
# Common query options # Common query options
- `--use-output`; `-u`\ - `--use-output` / `-u`
For each argument to the query that is a [store derivation], apply the For each argument to the query that is a [store derivation], apply the
query to the output path of the derivation instead. query to the output path of the derivation instead.
- `--force-realise`; `-f`\ - `--force-realise` / `-f`
Realise each argument to the query first (see [`nix-store --realise`](./realise.md)). Realise each argument to the query first (see [`nix-store --realise`](./realise.md)).
[store derivation]: @docroot@/glossary.md#gloss-store-derivation [store derivation]: @docroot@/glossary.md#gloss-store-derivation
# Queries # Queries
- `--outputs`\ - `--outputs`
Prints out the [output paths] of the store Prints out the [output paths] of the store
derivations *paths*. These are the paths that will be produced when derivations *paths*. These are the paths that will be produced when
the derivation is built. the derivation is built.
[output paths]: @docroot@/glossary.md#gloss-output-path [output paths]: @docroot@/glossary.md#gloss-output-path
- `--requisites`; `-R`\ - `--requisites` / `-R`
Prints out the [closure] of the store path *paths*. Prints out the [closure] of the store path *paths*.
[closure]: @docroot@/glossary.md#gloss-closure [closure]: @docroot@/glossary.md#gloss-closure
@ -61,27 +65,31 @@ symlink.
dependencies) is obtained by distributing the closure of a store dependencies) is obtained by distributing the closure of a store
derivation and specifying the option `--include-outputs`. derivation and specifying the option `--include-outputs`.
- `--references`\ - `--references`
Prints the set of [references] of the store paths Prints the set of [references] of the store paths
*paths*, that is, their immediate dependencies. (For *all* *paths*, that is, their immediate dependencies. (For *all*
dependencies, use `--requisites`.) dependencies, use `--requisites`.)
[references]: @docroot@/glossary.md#gloss-reference [references]: @docroot@/glossary.md#gloss-reference
- `--referrers`\ - `--referrers`
Prints the set of *referrers* of the store paths *paths*, that is, Prints the set of *referrers* of the store paths *paths*, that is,
the store paths currently existing in the Nix store that refer to the store paths currently existing in the Nix store that refer to
one of *paths*. Note that contrary to the references, the set of one of *paths*. Note that contrary to the references, the set of
referrers is not constant; it can change as store paths are added or referrers is not constant; it can change as store paths are added or
removed. removed.
- `--referrers-closure`\ - `--referrers-closure`
Prints the closure of the set of store paths *paths* under the Prints the closure of the set of store paths *paths* under the
referrers relation; that is, all store paths that directly or referrers relation; that is, all store paths that directly or
indirectly refer to one of *paths*. These are all the path currently indirectly refer to one of *paths*. These are all the path currently
in the Nix store that are dependent on *paths*. in the Nix store that are dependent on *paths*.
- `--deriver`; `-d`\ - `--deriver` / `-d`
Prints the [deriver] that was used to build the store paths *paths*. If Prints the [deriver] that was used to build the store paths *paths*. If
the path has no deriver (e.g., if it is a source file), or if the the path has no deriver (e.g., if it is a source file), or if the
deriver is not known (e.g., in the case of a binary-only deriver is not known (e.g., in the case of a binary-only
@ -92,12 +100,14 @@ symlink.
[deriver]: @docroot@/glossary.md#gloss-deriver [deriver]: @docroot@/glossary.md#gloss-deriver
- `--valid-derivers`\ - `--valid-derivers`
Prints a set of derivation files (`.drv`) which are supposed produce Prints a set of derivation files (`.drv`) which are supposed produce
said paths when realized. Might print nothing, for example for source paths said paths when realized. Might print nothing, for example for source paths
or paths subsituted from a binary cache. or paths subsituted from a binary cache.
- `--graph`\ - `--graph`
Prints the references graph of the store paths *paths* in the format Prints the references graph of the store paths *paths* in the format
of the `dot` tool of AT\&T's [Graphviz of the `dot` tool of AT\&T's [Graphviz
package](http://www.graphviz.org/). This can be used to visualise package](http://www.graphviz.org/). This can be used to visualise
@ -105,39 +115,45 @@ symlink.
this to a store derivation. To obtain a runtime dependency graph, this to a store derivation. To obtain a runtime dependency graph,
apply it to an output path. apply it to an output path.
- `--tree`\ - `--tree`
Prints the references graph of the store paths *paths* as a nested Prints the references graph of the store paths *paths* as a nested
ASCII tree. References are ordered by descending closure size; this ASCII tree. References are ordered by descending closure size; this
tends to flatten the tree, making it more readable. The query only tends to flatten the tree, making it more readable. The query only
recurses into a store path when it is first encountered; this recurses into a store path when it is first encountered; this
prevents a blowup of the tree representation of the graph. prevents a blowup of the tree representation of the graph.
- `--graphml`\ - `--graphml`
Prints the references graph of the store paths *paths* in the Prints the references graph of the store paths *paths* in the
[GraphML](http://graphml.graphdrawing.org/) file format. This can be [GraphML](http://graphml.graphdrawing.org/) file format. This can be
used to visualise dependency graphs. To obtain a build-time used to visualise dependency graphs. To obtain a build-time
dependency graph, apply this to a [store derivation]. To obtain a dependency graph, apply this to a [store derivation]. To obtain a
runtime dependency graph, apply it to an output path. runtime dependency graph, apply it to an output path.
- `--binding` *name*; `-b` *name*\ - `--binding` *name* / `-b` *name*
Prints the value of the attribute *name* (i.e., environment Prints the value of the attribute *name* (i.e., environment
variable) of the [store derivation]s *paths*. It is an error for a variable) of the [store derivation]s *paths*. It is an error for a
derivation to not have the specified attribute. derivation to not have the specified attribute.
- `--hash`\ - `--hash`
Prints the SHA-256 hash of the contents of the store paths *paths* Prints the SHA-256 hash of the contents of the store paths *paths*
(that is, the hash of the output of `nix-store --dump` on the given (that is, the hash of the output of `nix-store --dump` on the given
paths). Since the hash is stored in the Nix database, this is a fast paths). Since the hash is stored in the Nix database, this is a fast
operation. operation.
- `--size`\ - `--size`
Prints the size in bytes of the contents of the store paths *paths* Prints the size in bytes of the contents of the store paths *paths*
— to be precise, the size of the output of `nix-store --dump` on — to be precise, the size of the output of `nix-store --dump` on
the given paths. Note that the actual disk space required by the the given paths. Note that the actual disk space required by the
store paths may be higher, especially on filesystems with large store paths may be higher, especially on filesystems with large
cluster sizes. cluster sizes.
- `--roots`\ - `--roots`
Prints the garbage collector roots that point, directly or Prints the garbage collector roots that point, directly or
indirectly, at the store paths *paths*. indirectly, at the store paths *paths*.

9
doc/manual/src/command-ref/nix-store/realise.md
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@ -42,15 +42,18 @@ For non-derivation arguments, the argument itself is printed.
# Options # Options
- `--dry-run`\ - `--dry-run`
Print on standard error a description of what packages would be Print on standard error a description of what packages would be
built or downloaded, without actually performing the operation. built or downloaded, without actually performing the operation.
- `--ignore-unknown`\ - `--ignore-unknown`
If a non-derivation path does not have a substitute, then silently If a non-derivation path does not have a substitute, then silently
ignore it. ignore it.
- `--check`\ - `--check`
This option allows you to check whether a derivation is This option allows you to check whether a derivation is
deterministic. It rebuilds the specified derivation and checks deterministic. It rebuilds the specified derivation and checks
whether the result is bitwise-identical with the existing outputs, whether the result is bitwise-identical with the existing outputs,

3
doc/manual/src/command-ref/nix-store/serve.md
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@ -14,7 +14,8 @@ access to a restricted ssh user.
The following flags are available: The following flags are available:
- `--write`\ - `--write`
Allow the connected client to request the realization of Allow the connected client to request the realization of
derivations. In effect, this can be used to make the host act as a derivations. In effect, this can be used to make the host act as a
remote builder. remote builder.

6
doc/manual/src/command-ref/nix-store/verify.md
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@ -16,14 +16,16 @@ being modified by non-Nix tools, or of bugs in Nix itself.
This operation has the following options: This operation has the following options:
- `--check-contents`\ - `--check-contents`
Checks that the contents of every valid store path has not been Checks that the contents of every valid store path has not been
altered by computing a SHA-256 hash of the contents and comparing it altered by computing a SHA-256 hash of the contents and comparing it
with the hash stored in the Nix database at build time. Paths that with the hash stored in the Nix database at build time. Paths that
have been modified are printed out. For large stores, have been modified are printed out. For large stores,
`--check-contents` is obviously quite slow. `--check-contents` is obviously quite slow.
- `--repair`\ - `--repair`
If any valid path is missing from the store, or (if If any valid path is missing from the store, or (if
`--check-contents` is given) the contents of a valid path has been `--check-contents` is given) the contents of a valid path has been
modified, then try to repair the path by redownloading it. See modified, then try to repair the path by redownloading it. See