yosys: 0.25 -> 0.26

in stdenv.mkDerivation rec {

  pname   = "yosys";

  version = "0.25";

  version = "0.26";

  src = fetchFromGitHub {

    owner = "YosysHQ";

    repo  = "yosys";

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

    hash  = "sha256-hOuuKvT6ZM7G0HTGtVeEHHfJWqwUinD+DxT3r0CQZH0=";

    hash  = "sha256-0xV+323YTK+VhnD05SmvGv8uT4TzqA9IZ/iKl1as1Kc=";

  };

  enableParallelBuilding = true;