yosys: 0.27 -> 0.28 https://github.com/YosysHQ/yosys/releases/tag/yosys-0.28

in stdenv.mkDerivation rec {

  pname   = "yosys";

  version = "0.27";

  version = "0.28";

  src = fetchFromGitHub {

    owner = "YosysHQ";

    repo  = "yosys";

    rev   = "${pname}-${version}";

    hash  = "sha256-u6SeVlmQVCF3xCGajxsv0ZAgMKg6aa6WdN3DLKTPNYo=";

    hash  = "sha256-z550IAyo4Rbq9/S2Vwgec3sy7KH2n95PH0k8vo/pBSE=";

  };

  enableParallelBuilding = true;