chore: small fixes

modules/home-manager/direnv.nix

@@ -1,18 +1,30 @@
-{ config, lib, ... }: 
+{ config, lib, ... }:
 with lib;
 
 let
   cfg = config.custom-hm.direnv;
+  changeCacheDir = ''
+    declare -A direnv_layout_dirs
+    direnv_layout_dir() {
+        local hash path
+        echo "''${direnv_layout_dirs[$PWD]:=$(
+            hash="$(sha1sum - <<< "$PWD" | head -c40)"
+            path="''${PWD//[^a-zA-Z0-9]/-}"
+            echo "''${XDG_CACHE_HOME}/direnv/layouts/''${hash}''${path}"
+        )}"
+    }
+  '';
 in
 {
   options.custom-hm.direnv = {
     enable = mkEnableOption "direnv";
   };
   config = {
-    programs = mkIf config.custom-hm.direnv.enable {
+    programs = mkIf cfg.enable {
       direnv = {
         enable = true;
+        stdlib = changeCacheDir;
       };
     };
   };
-}
+}