anchor.diff:  
       buildPhase = ''
           ${buildCmd}
  +        ln -s ${ldcBuild.out}/bin/ldmd2 $PWD/bin/ldmd2
           ${testCmd}
       '';
   
  
positive.code:         #
          #==============================
          #Test failed: expected rc == 0, exited with rc == 1
          rm tests/d2/dmd-testsuite/runnable/variadic.d
      ''
  
      + stdenv.lib.optionalString (!bootstrapVersion) ''
  	    # http://forum.dlang.org/thread/xtbbqthxutdoyhnxjhxl@forum.dlang.org
  	    rm -r tests/dynamiccompile
      '';
  
      ROOT_HOME_DIR = "$(echo ~root)";
  
negative.code: , python, libconfig, lit, gdb, unzip, darwin, bash
  , callPackage
  , bootstrapVersion ? false
  , version ? "1.8.0"
  , ldcSha256 ? "0zswjlibj8zcdj06nn09jjhbd99chsa5f4kps8xifzgrpgsa28g4"
  }:
  
  let
  