diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 4cceb32..4ace352 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -115,6 +115,7 @@
     gtk2
     gtk3
     gtk4
+    gtkmm
     gtkd
   ];