nix-community.nixvim/flake-modules/packages.nix

{
  perSystem = {
    pkgs,
    pkgsUnfree,
    config,
    modules,
    ...
  }: {
    packages = let
      docs = {
        docs = pkgsUnfree.callPackage (import ../docs) {
          inherit modules;
        };
      };

      man-docs = import ../man-docs {
        pkgs = pkgsUnfree;
        inherit modules;
      };
    in
      docs
      // man-docs;
  };
}