anchor.diff:    };
   
     mathutil = buildFromGitHub {
  -    date = "2016-01-19";
  -    rev = "38a5fe05cd94d69433fd1c928417834c604f281d";
  +    date = "2016-06-13";
  +    rev = "78ad7f262603437f0ecfebc835d80094f89c8f54";
       owner = "cznic";
       repo = "mathutil";
  -    sha256 = "08z3ss9lw9r9mczba2dki1q0sa24gvvwg9ky9akgk045zpsx650b";
  +    sha256 = "0va6bnjvrrff0jlgpiflahf837nrazmyrpqx8yx63dvqj5yddvcv";
       buildInputs = [ bigfft ];
     };
   
  
positive.code:     ];
    };
  
    raft = buildFromGitHub {
      date = "2016-06-03";
      rev = "4bcac2adb06930200744feb591fee8a0790f9c98";
  
negative.code:   };
  
    tools = buildFromGitHub {
      rev = "a2a552218a0e22e6fb22469f49ef371b492f6178";
      date = "2016-06-14";
      owner = "golang";
      repo = "tools";
      sha256 = "0l20nnfzzsf6x03b3n034vfj4r87d4rzcjnffa0wmlcl6zys2krc";
      goPackagePath = "golang.org/x/tools";
      goPackageAliases = [ "code.google.com/p/go.tools" ];
  
  