mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-22 05:56:15 +02:00
eb7d7780b1
This is needed to avoid this https://github.com/mesonbuild/meson/issues/13774 when we go back to making our subproject directory `src`.
125 lines
3.8 KiB
Markdown
125 lines
3.8 KiB
Markdown
# Name
|
||
|
||
`nix-build` - build a Nix expression
|
||
|
||
# Synopsis
|
||
|
||
`nix-build` [*paths…*]
|
||
[`--arg` *name* *value*]
|
||
[`--argstr` *name* *value*]
|
||
[{`--attr` | `-A`} *attrPath*]
|
||
[`--no-out-link`]
|
||
[`--dry-run`]
|
||
[{`--out-link` | `-o`} *outlink*]
|
||
|
||
# Disambiguation
|
||
|
||
This man page describes the command `nix-build`, which is distinct from `nix
|
||
build`. For documentation on the latter, run `nix build --help` or see `man
|
||
nix3-build`.
|
||
|
||
# Description
|
||
|
||
The `nix-build` command builds the derivations described by the Nix
|
||
expressions in *paths*. If the build succeeds, it places a symlink to
|
||
the result in the current directory. The symlink is called `result`. If
|
||
there are multiple Nix expressions, or the Nix expressions evaluate to
|
||
multiple derivations, multiple sequentially numbered symlinks are
|
||
created (`result`, `result-2`, and so on).
|
||
|
||
If no *paths* are specified, then `nix-build` will use `default.nix` in
|
||
the current directory, if it exists.
|
||
|
||
If an element of *paths* starts with `http://` or `https://`, it is
|
||
interpreted as the URL of a tarball that will be downloaded and unpacked
|
||
to a temporary location. The tarball must include a single top-level
|
||
directory containing at least a file named `default.nix`.
|
||
|
||
`nix-build` is essentially a wrapper around
|
||
[`nix-instantiate`](nix-instantiate.md) (to translate a high-level Nix
|
||
expression to a low-level [store derivation]) and [`nix-store
|
||
--realise`](@docroot@/command-ref/nix-store/realise.md) (to build the store
|
||
derivation).
|
||
|
||
[store derivation]: @docroot@/glossary.md#gloss-store-derivation
|
||
|
||
> **Warning**
|
||
>
|
||
> The result of the build is automatically registered as a root of the
|
||
> Nix garbage collector. This root disappears automatically when the
|
||
> `result` symlink is deleted or renamed. So don’t rename the symlink.
|
||
|
||
# Options
|
||
|
||
All options not listed here are passed to
|
||
[`nix-store --realise`](nix-store/realise.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>
|
||
|
||
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
|
||
might be deleted by `nix-store --gc`.
|
||
|
||
- <span id="opt-dry-run">[`--dry-run`](#opt-dry-run)</span>
|
||
|
||
Show what store paths would be built or downloaded.
|
||
|
||
- <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
|
||
`result` to *outlink*.
|
||
|
||
{{#include ./status-build-failure.md}}
|
||
|
||
{{#include ./opt-common.md}}
|
||
|
||
{{#include ./env-common.md}}
|
||
|
||
# Examples
|
||
|
||
```console
|
||
$ nix-build '<nixpkgs>' --attr firefox
|
||
store derivation is /nix/store/qybprl8sz2lc...-firefox-1.5.0.7.drv
|
||
/nix/store/d18hyl92g30l...-firefox-1.5.0.7
|
||
|
||
$ ls -l result
|
||
lrwxrwxrwx ... result -> /nix/store/d18hyl92g30l...-firefox-1.5.0.7
|
||
|
||
$ ls ./result/bin/
|
||
firefox firefox-config
|
||
```
|
||
|
||
If a derivation has multiple outputs, `nix-build` will build the default
|
||
(first) output. You can also build all outputs:
|
||
|
||
```console
|
||
$ nix-build '<nixpkgs>' --attr openssl.all
|
||
```
|
||
|
||
This will create a symlink for each output named `result-outputname`.
|
||
The suffix is omitted if the output name is `out`. So if `openssl` has
|
||
outputs `out`, `bin` and `man`, `nix-build` will create symlinks
|
||
`result`, `result-bin` and `result-man`. It’s also possible to build a
|
||
specific output:
|
||
|
||
```console
|
||
$ nix-build '<nixpkgs>' --attr openssl.man
|
||
```
|
||
|
||
This will create a symlink `result-man`.
|
||
|
||
Build a Nix expression given on the command line:
|
||
|
||
```console
|
||
$ nix-build --expr 'with import <nixpkgs> { }; runCommand "foo" { } "echo bar > $out"'
|
||
$ cat ./result
|
||
bar
|
||
```
|
||
|
||
Build the GNU Hello package from the latest revision of the master
|
||
branch of Nixpkgs:
|
||
|
||
```console
|
||
$ nix-build https://github.com/NixOS/nixpkgs/archive/master.tar.gz --attr hello
|
||
```
|