Warning
This program is experimental ⟨@docroot@/development/experimental-features.md#xp-feature-nix-command⟩ and its interface is subject to change.
Name
nix upgrade-nix - upgrade Nix to the latest stable version
Synopsis
nix upgrade-nix [option…]
Examples
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Upgrade Nix to the stable version declared in Nixpkgs:
# nix upgrade-nix
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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 ⟨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
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--dry-run⟨#opt-dry-run⟩
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Show what this command would do without doing it.
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--nix-store-paths-url⟨#opt-nix-store-paths-url⟩ url
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The URL of the file that contains the store paths of the latest Nix release.
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--profile⟨#opt-profile⟩ /-pprofile-dir
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The path to the Nix profile to upgrade.
Logging-related options
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--debug⟨#opt-debug⟩
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Set the logging verbosity level to ‘debug’.
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--log-format⟨#opt-log-format⟩ format
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Set the format of log output; one of
raw,internal-json,barorbar-with-logs.
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--print-build-logs⟨#opt-print-build-logs⟩ /-L
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Print full build logs on standard error.
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--quiet⟨#opt-quiet⟩
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Decrease the logging verbosity level.
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--verbose⟨#opt-verbose⟩ /-v
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Increase the logging verbosity level.
Miscellaneous global options
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--help⟨#opt-help⟩
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Show usage information.
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--offline⟨#opt-offline⟩
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Disable substituters and consider all previously downloaded files up-to-date.
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--option⟨#opt-option⟩ name value
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Set the Nix configuration setting name to value (overriding
nix.conf).
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--refresh⟨#opt-refresh⟩
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Consider all previously downloaded files out-of-date.
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--version⟨#opt-version⟩
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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.