anchor.diff:      repo = "elvish";
       owner = "elves";
       rev = version;
  -    sha256 = "0alsv04iihrk1nffp6fmyzxid26dqhg1k45957c2ymyzyq9cglxj";
  +    sha256 = "0v6byd81nz0fbd3sdlippi1jn1z3gbqc2shnr7akd1n6k9259vrj";
     };
   
     meta = with stdenv.lib; {
  
positive.code:     homepage = https://github.com/elves/elvish;
      license = licenses.bsd2;
      maintainers = with maintainers; [ vrthra ];
      platforms = with platforms; linux;
    };
  }
  
negative.code: 
  buildGoPackage rec {
    name = "elvish-${version}";
    version = "0.10";
  
    postInstall = stdenv.lib.optionalString (stdenv.isDarwin) ''
      install_name_tool -delete_rpath $out/lib $bin/bin/elvish
    '';
  
    goPackagePath = "github.com/elves/elvish";
  
  