nix3-upgrade-nix(1)

Usage

nix upgrade-nix [option…]

Warning
This program is experimental ⟨@docroot@/development/experimental-features.md#xp-feature-nix-command⟩ and its interface is subject to change.

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

Overview

This command upgrades Nix to the stable version.

By default, the latest stable version is defined by Nixpkgs, in nix-fallback-paths.nix ⟨https://github.com/NixOS/nixpkgs/raw/master/nixos/modules/installer/tools/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` ⟨#opt-dry-run⟩
	Show what this command would do without doing it.
`•`	`--nix-store-paths-url` ⟨#opt-nix-store-paths-url⟩ url
	The URL of the file that contains the store paths of the latest Nix release.
`•`	`--profile` ⟨#opt-profile⟩ / `-p` profile-dir
	The path to the Nix profile to upgrade.

Logging-related options

`•`	`--debug` ⟨#opt-debug⟩
	Set the logging verbosity level to ‘debug’.
`•`	`--log-format` ⟨#opt-log-format⟩ format
	Set the format of log output; one of `raw`, `internal-json`, `bar` or `bar-with-logs`.
`•`	`--print-build-logs` ⟨#opt-print-build-logs⟩ / `-L`
	Print full build logs on standard error.
`•`	`--quiet` ⟨#opt-quiet⟩
	Decrease the logging verbosity level.
`•`	`--verbose` ⟨#opt-verbose⟩ / `-v`
	Increase the logging verbosity level.

Miscellaneous global options

•: --help ⟨#opt-help⟩

: Show usage information.

•: --offline ⟨#opt-offline⟩

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

•: --option ⟨#opt-option⟩ name value

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

•: --refresh ⟨#opt-refresh⟩

: Consider all previously downloaded files out-of-date.

•: --version ⟨#opt-version⟩

: Show version information.

Note

See man nix.conf ⟨@docroot@/command-ref/conf-file.md#command-line-flags⟩ for overriding configuration settings with command line flags.

Releases

2 releases since Debian 12 (Bookworm); the text changed 1 time.

12
13