diff --git a/hosts/galactica/configuration.nix b/hosts/galactica/configuration.nix
index 58ab0c3..0705265 100644
--- a/hosts/galactica/configuration.nix
+++ b/hosts/galactica/configuration.nix
@@ -185,6 +185,9 @@ in {
     "aspnetcore-runtime-wrapped-6.0.36"
     "dotnet-sdk-6.0.428"
     "dotnet-sdk-wrapped-6.0.428"
+    # Build-time dependency of opencloud's web frontend; only used during
+    # the pnpm fetch/build, not at runtime.
+    "pnpm-9.15.9"
   ];
 
   services.check-stock = {
diff --git a/modules/constellation/desktop.nix b/modules/constellation/desktop.nix
index d62add2..011e853 100644
--- a/modules/constellation/desktop.nix
+++ b/modules/constellation/desktop.nix
@@ -165,7 +165,8 @@ in {
             gst_all_1.gst-plugins-bad
             gst_all_1.gst-plugins-ugly
             gst_all_1.gst-libav
-            gst_all_1.gst-vaapi
+            # gst-vaapi was removed in GStreamer 1.28; VA-API decoding is now
+            # provided by gst-plugins-bad (already included above).
           ]
           ++ lib.optionals cfg.virtualization [
             quickemu