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nix-super/src/nix/flake-lock.md
Kevin Cox d2f627dda9
Improve documentation of nix flake lock 
The previous documentation was inaccurate, stating that it would not update existing inputs. However these inputs will be updated if they are outdated (for example the version of an existing input has been changed). The new text properly reflects this behaviour.
2024-09-30 17:27:49 -04:00

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R""(

Examples

  • Create the lock file for the flake in the current directory:

    # nix flake lock
warning: creating lock file '/home/myself/repos/testflake/flake.lock':
• Added input 'nix':
    'github:NixOS/nix/9fab14adbc3810d5cc1f88672fde1eee4358405c' (2023-06-28)
• Added input 'nixpkgs':
    'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30)

  • Add missing inputs to the lock file for a flake in a different directory:

    # nix flake lock ~/repos/another
warning: updating lock file '/home/myself/repos/another/flake.lock':
• Added input 'nixpkgs':
    'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30)

    Note

    When trying to refer to a flake in a subdirectory, write ./another instead of another. Otherwise Nix will try to look up the flake in the registry.

Description

This command updates the lock file of a flake (flake.lock) so that it contains an up-to-date lock for every flake input specified in flake.nix. Lock file entries are aready up-to-date are not modified.

If you want to update existing lock entries, use nix flake update

)""