path: root/src/nix-env/help.txt

nix-env [OPTIONS...] [ARGUMENTS...]

`nix-env' is a tool to manipulate Nix user environments.

Operations:

  --install / -i FILE: add a derivation to the user environment
  --uninstall / -u: remove a derivation to 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.

  --version: output version information
  --help: display help

Query types:

  --name: print derivation names (default)
  --expr / -e: print derivation store expression
  --status / -s: print installed/present status

Query sources:

  --installed: use installed derivations (default)
  --available / -f FILE: use derivations available in expression FILE

Options:

  --verbose / -v: verbose operation (may be repeated)
  --keep-failed / -K: keep temporary directories of failed builds