anchor.diff:  , storePathAsBuildHash ? false }:
   
   let
  -  version = "6.3.0";
  +  version = "6.3.1";
   
     goPackagePath = "github.com/mattermost/mattermost-server";
   
  
positive.code:       owner = "mattermost";
        repo = "mattermost-server";
        rev = "v${version}";
        sha256 = "y3VTDl01UrMpgoN06lf98C+uTu2N9u0EAWYADPpOI3w=";
      };
  
      ldflags = [
  
negative.code: 
      src = fetchurl {
        url = "https://releases.mattermost.com/${version}/mattermost-${version}-linux-amd64.tar.gz";
        sha256 = "lFwSZsAcQuuWTN+4wCe7GDLkhp1ASn5GE7/K5Vppr14=";
      };
  
      installPhase = ''
  