anchor.diff:        meta.schedulingPriority = prio;
         configureFlags = "--sysconfdir=/etc";
         debRequires = [ "curl" "libdbd-sqlite3-perl" "libsqlite3-0" "libbz2-1.0" ];
  -      installCheckPhase = ''
  -        make installcheck
  -      '';
  -      postPhases = [ "installCheckPhase" ];
  +      doInstallCheck = true;
       };
   
   
  
positive.code:           --enable-gc
          '';
  
          installCheckPhase = ''
            make installcheck
          '';
  
          postPhases = [ "installCheckPhase" ];
        };
  
  
  
negative.code: 
          dontInstall = false;
  
          doInstallCheck = true;
          
          lcovFilter = [ "*/boost/*" "*-tab.*" ];
  
  