diff --git a/.github/workflows/flatpak-nightly.yml b/.github/workflows/flatpak-nightly.yml
index 3d08c5a4..f81a29b5 100644
--- a/.github/workflows/flatpak-nightly.yml
+++ b/.github/workflows/flatpak-nightly.yml
@@ -26,8 +26,12 @@ jobs:
       uses: docker/setup-qemu-action@v1
       with:
         platforms: arm64
+    - name: Prepare Runtime
+      run: |
+        flatpak --system install -y --noninteractive flathub org.freedesktop.Sdk.Extension.rust-nightly/${{ matrix.arch }}/21.08
+        flatpak --system install -y --noninteractive flathub org.freedesktop.Sdk.Extension.llvm13/${{ matrix.arch }}/21.08
     - uses: bilelmoussaoui/flatpak-github-actions/flatpak-builder@v4
-      name: "Build"
+      name: Build
       with:
         bundle: com.github.rafostar.Clapper.flatpak
         manifest-path: pkgs/flatpak/com.github.rafostar.Clapper-nightly.json
diff --git a/pkgs/flatpak/testing/gstreamer.json b/pkgs/flatpak/testing/gstreamer.json
index 6daf1583..ae475666 100644
--- a/pkgs/flatpak/testing/gstreamer.json
+++ b/pkgs/flatpak/testing/gstreamer.json
@@ -2,7 +2,7 @@
     "name": "gstreamer",
     "buildsystem": "meson",
     "config-opts": [
-        "--wrap-mode=nofallback",
+        "--wrap-mode=nodownload",
 
         "-Dbase=enabled",
         "-Dgood=enabled",
@@ -26,26 +26,12 @@
         "-Dgpl=enabled",
 
         "-Dgstreamer:benchmarks=disabled",
-        "-Dgstreamer:gobject-cast-checks=disabled",
-        "-Dgstreamer:glib-asserts=disabled",
-        "-Dgstreamer:glib-checks=disabled",
-        "-Dgstreamer:extra-checks=disabled",
 
-        "-Dgst-plugins-base:gobject-cast-checks=disabled",
-        "-Dgst-plugins-base:glib-asserts=disabled",
-        "-Dgst-plugins-base:glib-checks=disabled",
         "-Dgst-plugins-base:gl_api=opengl,gles2",
         "-Dgst-plugins-base:gl_platform=egl,glx",
 
-        "-Dgst-plugins-good:gobject-cast-checks=disabled",
-        "-Dgst-plugins-good:glib-asserts=disabled",
-        "-Dgst-plugins-good:glib-checks=disabled",
         "-Dgst-plugins-good:gtk3=disabled",
 
-        "-Dgst-plugins-bad:gobject-cast-checks=disabled",
-        "-Dgst-plugins-bad:glib-asserts=disabled",
-        "-Dgst-plugins-bad:glib-checks=disabled",
-        "-Dgst-plugins-bad:extra-checks=disabled",
         "-Dgst-plugins-bad:vulkan=disabled",
         "-Dgst-plugins-bad:webrtc=disabled",
         "-Dgst-plugins-bad:wasapi=disabled",
@@ -57,16 +43,14 @@
         "-Dgst-plugins-bad:v4l2codecs=enabled",
         "-Dgst-plugins-bad:va=enabled",
 
-        "-Dgst-plugins-ugly:gobject-cast-checks=disabled",
-        "-Dgst-plugins-ugly:glib-asserts=disabled",
-        "-Dgst-plugins-ugly:glib-checks=disabled",
         "-Dgst-plugins-ugly:mpeg2dec=enabled"
     ],
     "sources": [
         {
             "type": "git",
             "url": "https://gitlab.freedesktop.org/gstreamer/gstreamer.git",
-            "branch": "main"
+            "branch": "main",
+            "disable-submodules": true
         }
     ]
 }