diff --git a/overlays/my-pkgs.nix b/overlays/my-pkgs.nix
index d97889b..e4a39d6 100644
--- a/overlays/my-pkgs.nix
+++ b/overlays/my-pkgs.nix
@@ -1,5 +1,5 @@
 self: super: let
-  pkgsDir  = ./../pkgs;
+  pkgsDir  = builtins.toString ./../pkgs;
   pkgNames = builtins.attrNames (builtins.readDir pkgsDir);
   myPkgs   = builtins.listToAttrs (map (name: {
     name = name; value = super.callPackage (pkgsDir + "/" + name) {};