run PDS on Node 22

overlays/default.nix

@@ -1 +1,25 @@
-final: prev: { }
+final: prev: {
+  # PDS 0.4.5009 aborts in better-sqlite3 under Node 24. Node 22 satisfies
+  # PDS's Node 22+ requirement and keeps its native SQLite binding stable.
+  bluesky-pds = prev.bluesky-pds.overrideAttrs (old: {
+    nativeBuildInputs =
+      (builtins.filter (pkg: (pkg.pname or "") != "nodejs") old.nativeBuildInputs)
+      ++ [ prev.nodejs_22 ];
+
+    buildPhase = ''
+      runHook preBuild
+
+      pushd ./node_modules/.pnpm/better-sqlite3@*/node_modules/better-sqlite3
+      npm run build-release --offline --nodedir="${prev.srcOnly prev.nodejs_22}"
+      find build -type f -exec remove-references-to -t "${prev.srcOnly prev.nodejs_22}" {} \;
+      popd
+
+      makeWrapper "${prev.nodejs_22}/bin/node" "$out/bin/pds" \
+        --add-flags --enable-source-maps \
+        --add-flags "$out/lib/pds/index.ts" \
+        --set-default NODE_ENV production
+
+      runHook postBuild
+    '';
+  });
+}