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          Consider all previously downloaded files out-of-date.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

                                                                                             nix3-upgrade-nix(1)