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
- 
Show what this command would do without doing it. 
- 
The URL of the file that contains the store paths of the latest Nix release. 
- 
--profile/-pprofile-dirThe path to the Nix profile to upgrade. 
Logging-related options
- 
Set the logging verbosity level to 'debug'. 
- 
--log-formatformatSet the format of log output; one of raw,internal-json,barorbar-with-logs.
- 
--print-build-logs/-LPrint full build logs on standard error. 
- 
Decrease the logging verbosity level. 
- 
--verbose/-vIncrease the logging verbosity level. 
Miscellaneous global options
- 
Show usage information. 
- 
Disable substituters and consider all previously downloaded files up-to-date. 
- 
--optionname valueSet the Nix configuration setting name to value (overriding nix.conf).
- 
Consider all previously downloaded files out-of-date. 
- 
Show version information. 
Note
See
man nix.conffor overriding configuration settings with command line flags.