diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b84e986b499..7b9e52ccc00 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -754,6 +754,7 @@ let
   chkrootkit = callPackage ../tools/security/chkrootkit { };
 
   chocolateDoom = callPackage ../games/chocolate-doom { };
+  # master is here because chocolateDoom v2.0 has broken netplay
   chocolateDoomMaster = callPackage ../games/chocolate-doom/master.nix { };
 
   chrony = callPackage ../tools/networking/chrony { };