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Consider all previously downloaded files out-of-date.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