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618aa69b01
whether we want to upgrade if the current version is less than the available version (default), when it is less or equal, or always. * Added a flag `--dry-run' to show what would happen in `--install', `--uninstall', and `--upgrade', without actually performing the operation.
52 lines
1.7 KiB
Text
52 lines
1.7 KiB
Text
nix-env [OPTIONS...] [ARGUMENTS...]
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`nix-env' is a tool to manipulate Nix user environments.
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Operations:
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--install / -i: add derivations to the user environment
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--upgrade / -u: upgrade derivation in the user environment
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--uninstall / -e: remove derivations from the user environment
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--query / -q: perform a query on an environment or Nix expression
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The previous operations take a list of derivation names. The special
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name `*' may be used to indicate all derivations.
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--switch-profile / -S [FILE]: switch to specified profile
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--switch-generation / -G NUMBER: switch to specified generation of profile
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--rollback: switch to the previous generation
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--list-generations: list available generations of a profile
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--import / -I FILE: set default Nix expression
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--version: output version information
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--help: display help
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Install / upgrade / uninstall flags:
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--dry-run: show what would be done, but don't do it
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Upgrade flags:
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--lt: upgrade unless the current version is older (default)
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--leq: upgrade unless the current version is older or current
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--always: upgrade regardless of current version
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Query types:
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--name: print derivation names (default)
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--expr: print derivation store expression
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--status / -s: print installed/present status
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Query sources:
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--installed: use installed derivations (default)
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--available / -a: use derivations available in Nix expression
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Options:
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--profile / -p LINK: use specified profile instead of target of ~/.nix-profile
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--file / -f FILE: use Nix expression FILE for installation, etc.
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--verbose / -v: verbose operation (may be repeated)
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--keep-failed / -K: keep temporary directories of failed builds
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