anchor.diff:        sha256-simd
       ];
       meta.useUnstable = true;
  -    date = "2018-12-27";
  +    date = "2019-02-19";
     };
   
     go-multiplex = buildFromGitHub {
  
positive.code:     version = 6;
      owner = "btcsuite";
      repo = "btcd";
      date = "2019-01-15";
      rev = "ed77733ec07dfc8a513741138419b8d9d3de9d2d";
      sha256 = "211e821c7adb351315d520ab89381e0cf684ba0d26d3fd06bd90e32a521e8505";
      subPackages = [
        "btcec"
      ];
  
negative.code:       tar-utils
      ];
      meta.useUnstable = true;
      date = "2019-02-19";
    };
  
    go-ipfs-delay = buildFromGitHub {
  