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

Name

nix upgrade-nix - upgrade Nix to the latest stable version

Synopsis

nix upgrade-nix [option...]

Examples

• Upgrade Nix to the stable version declared in Nixpkgs:

  # nix upgrade-nix
  

• Upgrade Nix in a specific profile:

  # nix upgrade-nix --profile ~alice/.local/state/nix/profiles/profile
  

Description

This command upgrades Nix to the stable version.

By default, the latest stable version is defined by Nixpkgs, in nix-fallback-paths.nix and updated manually. It may not always be the latest tagged release.

By default, it locates the directory containing the nix binary in the $PATH environment variable. If that directory is a Nix profile, it will upgrade the nix package in that profile to the latest stable binary release.

You cannot use this command to upgrade Nix in the system profile of a NixOS system (that is, if nix is found in /run/current-system).

Options

• --dry-run

  Show what this command would do without doing it.

• --nix-store-paths-url url

  The URL of the file that contains the store paths of the latest Nix release.

• --profile / -p profile-dir

  The path to the Nix profile to upgrade.

Logging-related options

• --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  Consider all previously downloaded files out-of-date.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.

Note

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