diff --git a/lib/host.nix b/lib/host.nix
index 03e0a3c..e28b753 100644
--- a/lib/host.nix
+++ b/lib/host.nix
@@ -3,7 +3,7 @@
 {
   mkHost = { name, users, roles ? [ ], imports ? [ ] }:
     let
-      mkRole = role: import (../roles + "/${role}.nix");
+      mkRole = role: pkgs.callPackage (../roles + "/${role}.nix") { };
 
       users_mod = (map
         (u: