diff --git a/ioc/modules/common.nix b/ioc/modules/common.nix
index 4954c92c..60a0b2ee 100644
--- a/ioc/modules/common.nix
+++ b/ioc/modules/common.nix
@@ -54,6 +54,7 @@ with lib; {
     nixpkgs.overlays = [
       epnix.inputs.poetry2nix.overlays.default
       epnix.inputs.bash-lib.overlay
+      epnix.inputs.sphinxcontrib-nixdomain.overlays.default
       epnix.overlays.default
     ];
   };