anchor.diff:        ] ++ optional (cfg.databaseHost == "") "postgresql.service";
         wantedBy = [ "gitlab.target" ];
         partOf = [ "gitlab.target" ];
  -      environment = gitlabEnv;
  +      environment = gitlabEnv // (optionalAttrs cfg.sidekiq.memoryKiller.enable {
  +        SIDEKIQ_MEMORY_KILLER_MAX_RSS = cfg.sidekiq.memoryKiller.maxMemory;
  +        SIDEKIQ_MEMORY_KILLER_GRACE_TIME = cfg.sidekiq.memoryKiller.graceTime;
  +        SIDEKIQ_MEMORY_KILLER_SHUTDOWN_WAIT = cfg.sidekiq.memoryKiller.shutdownWait;
  +      });
         path = with pkgs; [
           postgresqlPackage
           git
  
positive.code:         # Needed for GitLab project imports
          gnutar
          gzip
        ];
        serviceConfig = {
          Type = "simple";
          User = cfg.user;
          Group = cfg.group;
          TimeoutSec = "infinity";
          Restart = "on-failure";
          WorkingDirectory = "${cfg.packages.gitlab}/share/gitlab";
          ExecStart="${cfg.packages.gitlab.rubyEnv}/bin/sidekiq -C \"${cfg.packages.gitlab}/share/gitlab/config/sidekiq_queues.yml\" -e production";
        };
  
negative.code:               Lock contention, so be careful when increasing this.
              </para>
            </note>
          '';
        };
  
        sidekiq.memoryKiller.enable = mkOption {
          type = types.bool;
          default = true;
          description = ''
            Whether the Sidekiq MemoryKiller should be turned
            on. MemoryKiller kills Sidekiq when its memory consumption
            exceeds a certain limit.
  
            See <link xlink:href="https://docs.gitlab.com/ee/administration/operations/sidekiq_memory_killer.html"/>
            for details.
          '';
        };
  
        sidekiq.memoryKiller.maxMemory = mkOption {
          type = types.int;
          default = 2000;
          apply = x: builtins.toString (x * 1024);
          description = ''
            The maximum amount of memory, in MiB, a Sidekiq worker is
            allowed to consume before being killed.
          '';
        };
  
        sidekiq.memoryKiller.graceTime = mkOption {
          type = types.int;
          default = 900;
          apply = x: builtins.toString x;
          description = ''
            The time MemoryKiller waits after noticing excessive memory
            consumption before killing Sidekiq.
          '';
        };
  
        sidekiq.memoryKiller.shutdownWait = mkOption {
          type = types.int;
          default = 30;
          apply = x: builtins.toString x;
          description = ''
            The time allowed for all jobs to finish before Sidekiq is
            killed forcefully.
          '';
        };
  
  