Fix sm64ex.

nix/configuration/roles/sm64ex/default.nix

@@ -34,6 +34,14 @@
         #   })
         # ];
 
+        nixpkgs.overlays = [
+          (final: prev: {
+            sm64ex = prev.sm64ex.overrideAttrs (old: {
+              buildInputs = old.buildInputs ++ [ final.libGL ];
+            });
+          })
+        ];
+
         # TODO perhaps install ~/.local/share/sm64ex/sm64config.txt
 
         environment.persistence."/persist" = lib.mkIf (!config.me.buildingIso) {