This program is experimental and its interface is subject to change.


nix store gc - perform garbage collection on a Nix store


nix store gc [option...]


  • Delete unreachable paths in the Nix store:

    # nix store gc
  • Delete up to 1 gigabyte of garbage:

    # nix store gc --max 1G


This command deletes unreachable paths in the Nix store.


  • --dry-run

    Show what this command would do without doing it.

  • --max n

    Stop after freeing n bytes of disk space.

  • --debug

    Set the logging verbosity level to 'debug'.

  • --log-format format

    Set the format of log output; one of raw, internal-json, bar or bar-with-logs.

  • --print-build-logs / -L

    Print full build logs on standard error.

  • --quiet

    Decrease the logging verbosity level.

  • --verbose / -v

    Increase the logging verbosity level.

Miscellaneous global options

  • --help

    Show usage information.

  • --offline

    Disable substituters and consider all previously downloaded files up-to-date.

  • --option name value

    Set the Nix configuration setting name to value (overriding nix.conf).

  • --refresh

    Consider all previously downloaded files out-of-date.

  • --version

    Show version information.


See man nix.conf for overriding configuration settings with command line flags.