yosys: 0.12+54 -> 0.15

in stdenv.mkDerivation rec {

  pname   = "yosys";

  version = "0.12+54";

  version = "0.15";

  src = fetchFromGitHub {

    owner = "YosysHQ";

    repo  = "yosys";

    rev   = "59a71503448401d2476cf0872808e0a99c3a4d81";

    hash  = "sha256-cz4PQymaA9UW91lN+6iniFhbcPRpFNIAeC8ZkwYeg0U=";

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

    hash  = "sha256-1NCcsq0otVKTTSSmnX2kCvvngF1yzqYWlRVzu+XY65w=";

  };

  enableParallelBuilding = true;