armagetronad: reproducible build by setting version

  };

  mkArmagetron = { version, src, dedicatedServer ? false, extraBuildInputs ? [ ], extraNativeBuildInputs ? [ ] }@params:

  let

    # Split the version into the major and minor parts

    versionParts = lib.splitString "-" version;

    splitVersion = lib.splitString "." (builtins.elemAt versionParts 0);

    majorVersion = builtins.concatStringsSep "." (lib.lists.take 2 splitVersion);

    minorVersionPart =  parts: sep: expectedSize:

      if builtins.length parts > expectedSize then

        sep + (builtins.concatStringsSep sep (lib.lists.drop expectedSize parts))

      else

        "";

    minorVersion = (minorVersionPart splitVersion "." 2) + (minorVersionPart versionParts "-" 1) + "-nixpkgs";

  in

    stdenv.mkDerivation rec {

      pname = if dedicatedServer then "armagetronad-dedicated" else "armagetronad";

      inherit version src;

      preConfigure = ''

        patchShebangs .

        # Create the version.

        echo "${majorVersion}" > major_version

        echo "${minorVersion}" > minor_version

        echo "Bootstrapping version: $(<major_version)$(<minor_version)" >&2

        ./bootstrap.sh

      '';

      installCheckPhase = ''

        export XDG_RUNTIME_DIR=/tmp

        bin="$out/bin/${pname}"

        version="$("$bin" --version || true)"

        prefix="$("$bin" --prefix || true)"

        rubber="$("$bin" --doc | grep -m1 CYCLE_RUBBER)"

        if [ "$prefix" != "$out" ] || \

        echo "Version: $version" >&2

        echo "Prefix: $prefix" >&2

        echo "Docstring: $rubber" >&2

        if [[ "$version" != *"${version}"* ]] || \

           [ "$prefix" != "$out" ] || \

           [[ ! "$rubber" =~ ^CYCLE_RUBBER[[:space:]]+Niceness[[:space:]]factor ]]; then

          exit 1

        fi