anchor.diff:      propagatedBuildInputs = [
         spacelog
       ];
  -
  -    preBuild = ''
  -      find go/src/$goPackagePath -name \*.go | xargs sed -i 's,spacemonkeygo/openssl,10gen/openssl,g'
  -    '';
     };
   
     opentracing-go = buildFromGitHub {
  
positive.code:       mkdir -p $bin/bin
        while read b; do
          rm -f go/bin/main
          go install $goPackagePath/$b/main
          cp go/bin/main $bin/bin/$b
        done < <(find go/src/$goPackagePath -name main | xargs dirname | xargs basename -a)
        rm -r go/bin
  
negative.code:   };
  
    escaper = buildFromGitHub {
      version = 6;
      owner = "lucasem";
      repo = "escaper";
      rev = "17fe61c658dcbdcbf246c783f4f7dc97efde3a8b";
  