diff --git a/modules/default.nix b/modules/default.nix
index 2661111..e22176d 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -71,6 +71,9 @@
     system.stateVersion = "20.03";
 
     nix = {
+      nixPath = [
+        "/var/src" # pinned nixpkgs and configuration
+      ];
       # Make sudoers trusted nix users
       trustedUsers = [ "@wheel" ];