anchor.diff:      homepage = http://clang.llvm.org/;
       description = "A C language family frontend for LLVM";
       license = "BSD";
  -    maintainers = with stdenv.lib.maintainers; [viric shlevy];
  +    maintainers = with stdenv.lib.maintainers; [viric shlevy vlstill];
       platforms = with stdenv.lib.platforms; all;
     };
   }
  
positive.code: { stdenv, fetchurl, perl, groff, llvm, cmake }:
  
  let version = "3.1"; in
  
  stdenv.mkDerivation {
    name = "clang-${version}";
  
negative.code:     "-DCLANG_PATH_TO_LLVM_BUILD=${llvm}"
      "-DCMAKE_BUILD_TYPE=Release"
      "-DLLVM_TARGETS_TO_BUILD=all"
      "-DGCC_INSTALL_PREFIX=${gccReal}"
    ] ++ stdenv.lib.optionals (stdenv.gcc.libc != null) [
      "-DC_INCLUDE_DIRS=${stdenv.gcc.libc}/include/"
    ];
  