anchor.diff:        owner = "mattermost";
         repo = "mattermost-server";
         rev = "v${version}";
  -      sha256 = "069ihmfr6np991mbgg001y0kyafghn57nsv3kpyyvfmhv07p0qbc";
  +      sha256 = "0hll62ad12drlqarr7y7zvjj0b12snqm8j5k923lj0064nlpc47z";
       };
   
       goPackagePath = "github.com/mattermost/mattermost-server";
  
positive.code: 
      src = fetchurl {
        url = "https://releases.mattermost.com/${version}/mattermost-${version}-linux-amd64.tar.gz";
        sha256 = "1bm5nqnhk2w3sy8mvm81k7d65j6bgpvakgphgwqgnlm864i4253z";
      };
  
      installPhase = ''
  
negative.code: { stdenv, fetchurl, fetchFromGitHub, buildGoPackage, buildEnv }:
  
  let
    version = "5.3.0";
  
    mattermost-server = buildGoPackage rec {
      name = "mattermost-server-${version}";
  