Warning: This program is experimental and its interface is subject to change.
Name
nix flake lock
- create missing lock file entries
Synopsis
nix flake lock
[option...] flake-url
Examples
-
Update the
nixpkgs
andnix
inputs of the flake in the current directory:# nix flake lock --update-input nixpkgs --update-input nix * Updated 'nix': 'github:NixOS/nix/9fab14adbc3810d5cc1f88672fde1eee4358405c' -> 'github:NixOS/nix/8927cba62f5afb33b01016d5c4f7f8b7d0adde3c' * Updated 'nixpkgs': 'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' -> 'github:NixOS/nixpkgs/a3a3dda3bacf61e8a39258a0ed9c924eeca8e293'
Description
This command updates the lock file of a flake (flake.lock
) so that
it contains a lock for every flake input specified in
flake.nix
. Existing lock file entries are not updated unless
required by a flag such as --update-input
.
Note that every command that operates on a flake will also update the lock file if needed, and supports the same flags. Therefore,
# nix flake lock --update-input nixpkgs
# nix build
is equivalent to:
# nix build --update-input nixpkgs
Thus, this command is only useful if you want to update the lock file separately from any other action such as building.
Options
Common evaluation options:
-
--arg
name expr
Pass the value expr as the argument name to Nix functions. -
--argstr
name string
Pass the string string as the argument name to Nix functions. -
--eval-store
store-url
The Nix store to use for evaluations. -
--impure
Allow access to mutable paths and repositories. -
--include
/-I
path
Add path to the list of locations used to look up<...>
file names. -
--override-flake
original-ref resolved-ref
Override the flake registries, redirecting original-ref to resolved-ref.
Common flake-related options:
-
--commit-lock-file
Commit changes to the flake's lock file. -
--inputs-from
flake-url
Use the inputs of the specified flake as registry entries. -
--no-registries
Don't allow lookups in the flake registries. This option is deprecated; use--no-use-registries
. -
--no-update-lock-file
Do not allow any updates to the flake's lock file. -
--override-input
input-path flake-url
Override a specific flake input (e.g.dwarffs/nixpkgs
). This implies--no-write-lock-file
. -
--recreate-lock-file
Recreate the flake's lock file from scratch. -
--update-input
input-path
Update a specific flake input (ignoring its previous entry in the lock file).