diff --git a/nix-darwin/default.nix b/nix-darwin/default.nix
index 007e2de38..57f7559a3 100644
--- a/nix-darwin/default.nix
+++ b/nix-darwin/default.nix
@@ -13,7 +13,7 @@ let
       lib = extendedLib;
       darwinConfig = config;
       osConfig = config;
-      modulesPath = ../modules;
+      modulesPath = builtins.toString ../modules;
     } // cfg.extraSpecialArgs;
     modules = [
       ({ name, ... }: {
diff --git a/nixos/default.nix b/nixos/default.nix
index a94ad1422..766ce76f9 100644
--- a/nixos/default.nix
+++ b/nixos/default.nix
@@ -13,7 +13,7 @@ let
       lib = extendedLib;
       nixosConfig = config;
       osConfig = config;
-      modulesPath = ../modules;
+      modulesPath = builtins.toString ../modules;
     } // cfg.extraSpecialArgs;
     modules = [
       ({ name, ... }: {