Stops rebuild on every change + better org-agenda-roam

user/app/doom-emacs/doom.nix

@@ -6,6 +6,30 @@ in
   programs.doom-emacs = {
     enable = true;
     doomPrivateDir = ./.;
+    # This block from https://github.com/znewman01/dotfiles/blob/be9f3a24c517a4ff345f213bf1cf7633713c9278/emacs/default.nix#L12-L34
+    # Only init/packages so we only rebuild when those change.
+    doomPackageDir = let
+      filteredPath = builtins.path {
+        path = ./.;
+        name = "doom-private-dir-filtered";
+        filter = path: type:
+          builtins.elem (baseNameOf path) [ "init.el" "packages.el" ];
+      };
+      in pkgs.linkFarm "doom-packages-dir" [
+        {
+          name = "init.el";
+          path = "${filteredPath}/init.el";
+        }
+        {
+          name = "packages.el";
+          path = "${filteredPath}/packages.el";
+        }
+        {
+          name = "config.el";
+          path = pkgs.emptyFile;
+        }
+      ];
+  # End block
   };
 
   home.file.".emacs.d/themes/doom-stylix-theme.el".source = config.lib.stylix.colors {