Set the notes directory path

nix/modules/home-manager/default.nix

@@ -20,4 +20,8 @@
     })
     ./features/desktop
   ];
+
+  home.sessionVariables = {
+    DOCUMENTS = "$HOME/Documents";
+  };
 }

nix/modules/home-manager/features/cli/notes.nix

@@ -1,5 +1,13 @@
 { pkgs, ... }:
 
 {
-  home.packages = with pkgs; [ notes ];
+  home = {
+    packages = with pkgs; [ notes ];
+
+    sessionVariables = {
+      NOTES_DIRECTORY = "$WIKI_DIRECTORY/notes";
+      WIKI_DIRECTORY = "$DOCUMENTS/wiki";
+    };
+  };
+
 }