anchor.diff:  , fetchFromBitbucket
   , fetchFromGitHub
   , fetchTritonPatch
  +, fetchzip
   , go
   , overrides
   , pkgs
  
positive.code:     , version
      , gxSha256 ? null
      , goPackagePath ? "github.com/${owner}/${repo}"
      , name ? baseNameOf goPackagePath
      , ...
      } @ args:
      buildGoPackage (args // (let
          name' = "${name}-${if date != null then date else if builtins.stringLength rev != 40 then rev else stdenv.lib.strings.substring 0 7 rev}";
        in {
          inherit rev goPackagePath;
          name = name';
          src = let
            src' = fetchFromGitHub {
              name = name';
              inherit rev owner repo sha256 version;
            };
          in if gxSha256 == null then
            src'
          else
            fetchGxPackage { src = src'; sha256 = gxSha256; };
        })
    );
  
    ## OFFICIAL GO PACKAGES
  
  
negative.code:     preferLocalBuild = true;
    };
  
    nameFunc =
      { rev
      , goPackagePath
      , name ? null
      , date ? null
      }:
      let
        name' =
          if name == null then
            baseNameOf goPackagePath
          else
            name;
        version =
          if date != null then
            date
          else if builtins.stringLength rev != 40 then
            rev
          else
            stdenv.lib.strings.substring 0 7 rev;
      in
        "${name'}-${version}";
  
    buildFromGitHub =
      { rev
      , date ? null
  