diff --git a/nix/home.nix b/nix/home.nix
index 5f56ed8..cc14383 100644
--- a/nix/home.nix
+++ b/nix/home.nix
@@ -55,8 +55,8 @@
     declare -A direnv_layout_dirs
     direnv_layout_dir() {
         echo "''${direnv_layout_dirs[$PWD]:=$(
-            echo -n "$XDG_CACHE_HOME"/direnv/layouts/
-            echo -n "$PWD" | sha1sum | cut -d ' ' -f 1
+          local path="''${PWD//[^a-zA-Z0-9]/-}"
+          echo "$XDG_CACHE_HOME/direnv/layouts/''${path:1}"
         )}"
     }
 '';