Merge pull request #310542 from rrbutani/fix/ucl-darwin

    sha256 = "b865299ffd45d73412293369c9754b07637680e5c826915f097577cd27350348";

  };

  # needed to successfully compile with gcc 6

  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isGNU "-std=c90";

  # needed to successfully compile with gcc 6+ and modern clang versions where

  # `-Wimplicit-function-declaration` is otherwise on and errors by default

  env.CFLAGS = "-std=c89";

  meta = {

    homepage = "http://www.oberhumer.com/opensource/ucl/";