flake: update flake.lock; use nixpkgs-multiverse

flake/overlays/default.nix

@@ -4,23 +4,25 @@
   config,
   ...
 }:
-let
-  channel = channel: final: _prev: {
-    ${channel} = import inputs."nixpkgs-${channel}" {
+[
+  (final: _prev: {
+    mv = inputs.multiverse.lib.mkMultiverse {
       inherit (final.stdenv.hostPlatform) system;
       inherit (config.nixpkgs) config;
     };
-  };
-in
-[
+  })
   (
     final: prev:
     lib.infuse prev {
       cage.__output.patches.__append = [ ./cage-specify-output-name.patch ];
       bottles.__input.removeWarningPopup.__assign = true;
+
+      jetbrains-mono.__assign = lib.warn ''
+        nanoemoji https://github.com/NixOS/nixpkgs/pull/552075
+      '' (final.mv.at "2026-08-12").jetbrains-mono;
+      moonlight-qt.__assign = lib.warn ''
+        moonlight-qt https://github.com/NixOS/nixpkgs/pull/552544
+      '' (final.mv.at "2026-08-10").moonlight-qt;
     }
   )
-  (channel "stable")
-  (channel "unstable-small")
-  (channel "master")
 ]