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Usage: nix-env [OPTIONS...] [ARGUMENTS...]
`nix-env' is a tool to manipulate Nix user environments.
Operations:
--install / -i: add derivations to the user environment
--upgrade / -u: upgrade derivation in the user environment
--set: create a user environment containing a single derivation
--uninstall / -e: remove derivations from the user environment
--query / -q: perform a query on an environment or Nix expression
The previous operations take a list of derivation names. The special
name `*' may be used to indicate all derivations.
--switch-profile / -S [FILE]: switch to specified profile
--switch-generation / -G NUMBER: switch to specified generation of profile
--rollback: switch to the previous generation
--list-generations: list available generations of a profile
--delete-generations GENERATIONS...: deleted listed generations,
`old' for all non-current generations
--import / -I FILE: set default Nix expression
--version: output version information
--help: display help
Install / upgrade / uninstall flags:
--dry-run: show what would be done, but don't do it
Installation sources:
--from-expression / -E EXPR...: evaluate expressions specified on
the command line; expressions should be functions that take the
default Nix expression as an argument
--from-profile PROFILE NAMES...: copy named packages from PROFILE
--attr / -A ATTRS...: select attributes by name from the default Nix
expression
Upgrade flags:
--lt: upgrade if the current version is older (default)
--leq: upgrade if the current version is older or equal
--eq: "upgrade" if the current version is equal
--always: upgrade regardless of current version
Query sources:
--installed: use installed derivations (default)
--available / -a: use derivations available in Nix expression
Query flags:
--xml: show output in XML format
--status / -s: print installed/present status
--no-name: hide derivation names
--attr-path / -P: shows the unambiguous attribute name of the
derivation which can be used when installing with -A
--system: print the platform type of the derivation
--compare-versions / -c: compare version to available or installed
--drv-path: print path of derivation
--out-path: print path of derivation output
--description: print description
--meta: print all meta attributes (only with --xml)
Options:
--profile / -p LINK: use specified profile instead of target of ~/.nix-profile
--file / -f FILE: use Nix expression FILE for installation, etc.
--verbose / -v: verbose operation (may be repeated)
--keep-failed / -K: keep temporary directories of failed builds
--preserve-installed: do not replace currently installed versions in `-i'
--system-filter SYSTEM: only use derivations for specified platform
--prebuilt-only / -b: only use derivations whose prebuilt binaries are
available on this machine or are downloadable
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