nix3-upgrade-nix(1) General Commands Manual nix3-upgrade-nix(1)

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

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

nix upgrade-nix [option…]

•
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

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).

•
--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.
•
--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.

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Consider all previously downloaded files out-of-date.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