Warning
This program is experimental and its interface is subject to change.
Name
nix flake update - update flake lock file
Synopsis
nix flake update [option...] inputs...
Examples
-
Update all inputs (i.e. recreate the lock file from scratch):
# nix flake update warning: updating lock file '/home/myself/repos/testflake/flake.lock': • Updated input 'nix': 'github:NixOS/nix/9fab14adbc3810d5cc1f88672fde1eee4358405c' (2023-06-28) → 'github:NixOS/nix/8927cba62f5afb33b01016d5c4f7f8b7d0adde3c' (2023-07-11) • Updated input 'nixpkgs': 'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30) → 'github:NixOS/nixpkgs/a3a3dda3bacf61e8a39258a0ed9c924eeca8e293' (2023-07-05) -
Update only a single input:
# nix flake update nixpkgs warning: updating lock file '/home/myself/repos/testflake/flake.lock': • Updated input 'nixpkgs': 'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30) → 'github:NixOS/nixpkgs/a3a3dda3bacf61e8a39258a0ed9c924eeca8e293' (2023-07-05) -
Update multiple inputs:
# nix flake update nixpkgs nixpkgs-unstable warning: updating lock file '/home/myself/repos/testflake/flake.lock': • Updated input 'nixpkgs': 'github:nixos/nixpkgs/8f7492cce28977fbf8bd12c72af08b1f6c7c3e49' (2024-09-14) → 'github:nixos/nixpkgs/086b448a5d54fd117f4dc2dee55c9f0ff461bdc1' (2024-09-16) • Updated input 'nixpkgs-unstable': 'github:nixos/nixpkgs/345c263f2f53a3710abe117f28a5cb86d0ba4059' (2024-09-13) → 'github:nixos/nixpkgs/99dc8785f6a0adac95f5e2ab05cc2e1bf666d172' (2024-09-16) -
Update only a single input of a flake in a different directory:
# nix flake update nixpkgs --flake ~/repos/another warning: updating lock file '/home/myself/repos/another/flake.lock': • Updated input 'nixpkgs': 'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30) → 'github:NixOS/nixpkgs/a3a3dda3bacf61e8a39258a0ed9c924eeca8e293' (2023-07-05)Note
When trying to refer to a flake in a subdirectory, write
./anotherinstead ofanother. Otherwise Nix will try to look up the flake in the registry.
Description
This command updates the inputs in a lock file (flake.lock).
By default, all inputs are updated. If the lock file doesn't exist
yet, it will be created. If inputs are not in the lock file yet, they will be added.
Unlike other nix flake commands, nix flake update takes a list of names of inputs
to update as its positional arguments and operates on the flake in the current directory.
You can pass a different flake-url with --flake to override that default.
The related command nix flake lock
also creates lock files and adds missing inputs, but is safer as it
will never update inputs already in the lock file.
Options
-
--flakeflake-urlThe flake to operate on. Default is the current directory.
Common evaluation options
-
--argname exprPass the value expr as the argument name to Nix functions.
-
--arg-from-filename pathPass the contents of file path as the argument name to Nix functions.
-
--arg-from-stdinnamePass the contents of stdin as the argument name to Nix functions.
-
--argstrname stringPass the string string as the argument name to Nix functions.
-
Start an interactive environment if evaluation fails.
-
--eval-storestore-urlThe URL of the Nix store to use for evaluation, i.e. to store derivations (
.drvfiles) and inputs referenced by them. -
Allow access to mutable paths and repositories.
-
--include/-IpathAdd path to search path entries used to resolve lookup paths
This option may be given multiple times.
Paths added through
-Itake precedence over thenix-pathconfiguration setting and theNIX_PATHenvironment variable. -
--override-flakeoriginal-ref resolved-refOverride the flake registries, redirecting original-ref to resolved-ref.
Common flake-related options
-
Commit changes to the flake's lock file.
-
--inputs-fromflake-urlUse the inputs of the specified flake as registry entries.
-
Don't allow lookups in the flake registries.
DEPRECATED
Use
--no-use-registriesinstead. -
--output-lock-fileflake-lock-pathWrite the given lock file instead of
flake.lockwithin the top-level flake. -
--override-inputinput-path flake-urlOverride a specific flake input (e.g.
dwarffs/nixpkgs). This implies--no-write-lock-file. -
Recreate the flake's lock file from scratch.
DEPRECATED
Use
nix flake updateinstead. -
--reference-lock-fileflake-lock-pathRead the given lock file instead of
flake.lockwithin the top-level flake. -
--update-inputinput-pathUpdate a specific flake input (ignoring its previous entry in the lock file).
DEPRECATED
Use
nix flake updateinstead.
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.
-
During evaluation, rewrite missing or corrupted files in the Nix store. During building, rebuild missing or corrupted store paths.
-
Show version information.
Note
See
man nix.conffor overriding configuration settings with command line flags.