factorio: stylistic changes from PR review

    Note the ultimate "_" is replaced with "-" in the --name arg!

    If you go this route you might want to tell nix to explicitly hold on to the

    source tarball. Otherwise it could get GC'd from the nix store and you'd

    If you go this route you might want to tell Nix to explicitly hold on to the

    source tarball. Otherwise it could get GC'd from the Nix store and you'd

    have to redownload it next time the package wants to rebuild to use a newer

    dependency. E.g. if you're using nixos:

    dependency. E.g. if you're using NixOS:

      system.extraDependencies = [

        factorio.src