diff --git a/.github/workflows/CI-master.yml b/.github/workflows/CI-master.yml
index a93f380a..270b81fe 100644
--- a/.github/workflows/CI-master.yml
+++ b/.github/workflows/CI-master.yml
@@ -79,6 +79,18 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Set up Flatpak
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y flatpak
+          sudo flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+          sudo flatpak update
+
+      - name: Install org.freedesktop.Sdk.Extension.vala-nightly
+        run: |
+          flatpak install -y org.freedesktop.Sdk.Extension.vala-nightly
+
+
       - name: Setup QEMU
         if: ${{ matrix.arch == 'aarch64' }}
         id: qemu