diff --git a/modules/nix/default.nix b/modules/nix/default.nix
index 69561d9..cfbf15b 100644
--- a/modules/nix/default.nix
+++ b/modules/nix/default.nix
@@ -18,7 +18,7 @@
     };
 
     extraOptions = ''
-      experimental-features = nix-command flakes ca-derivations
+      experimental-features = nix-command flakes ca-derivations impure-derivations
       builders-use-substitutes = true
     '';