4.flake-parts/ChangeLog.md

2022-10-11

• The nixpkgs input has been renamed to nixpkgs-lib to signify that the only dependency is on the lib attribute, which can be provided by either the nixpkgs?dir=lib subflake or by the nixpkgs flake itself.

• The templates now use the default, fixed nixpkgs?dir=lib dependency instead of a following nixpkgs dependency.

2022-05-25

• perSystem is not a functionTo submodule anymore, but a deferredModule, which is a lot like a regular submodule, but possible to invoke multiple times, for each system.

  All perSystem value definitions must remove the system: argument. If you need system to be in scope, use the one in the module arguments.

  -perSystem = system: { config, lib, ... }:
  +perSystem = { config, lib, system, ... }:
  

  All perSystem option declarations must now use flake-parts-lib.mkPerSystemOption.

  {
    options.perSystem = mkPerSystemOption ({ config, ... }: {
      options = {
        # ...
      };
      # ...
    });
  }
  

• flake-modules-core is now called flake-parts.

• flake.overlay has been removed in favor of flake.overlays.default.