[nix] Messing around with how to override desktop files

lib/default.nix

@@ -0,0 +1,3 @@
+{
+  inherit (import ./electron.nix) electronDesktopEntry;
+}

lib/electron.nix

@@ -0,0 +1,9 @@
+{
+  # Adds extra arguments to avoid flickering under wayland.
+  electronDesktopEntry =
+    desktop:
+    desktop
+    // {
+      exec = "${desktop.exec} --enable-features=UseOzonePlatform --ozone-platform=wayland --disable-gpu";
+    };
+}