diff --git a/options/copySysConf.nix b/options/copySysConf.nix
index fd5ec27..c78cfe7 100644
--- a/options/copySysConf.nix
+++ b/options/copySysConf.nix
@@ -33,6 +33,9 @@ in {
   };
 
   config = mkIf cfg.enable {
+    environment.variables = {
+      NIXOS_CONFIG_PATH = "${copySysConf}";
+    };
     nix = mkIf cfg.addToNixPath {
       # Do not use lib.optionals as it would override the default nixPath
       nixPath = [