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R""(
# Examples
* Update the `nixpkgs` and `nix` inputs of the flake in the current
directory:
```console
# 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,
```console
# nix flake lock --update-input nixpkgs
# nix build
```
is equivalent to:
```console
# 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.
)""
|
