diff --git a/system76/gaze18/default.nix b/system76/gaze18/default.nix
index 3ad85a0..7b87f1a 100644
--- a/system76/gaze18/default.nix
+++ b/system76/gaze18/default.nix
@@ -9,6 +9,7 @@
 
   hardware.opengl = {
     enable = lib.mkDefault true;
+    # adds ~100MB of 32-bit mesa drivers.
     driSupport32Bit = lib.mkDefault true;
   };