diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d170904..cf71411 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,12 +11,19 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+          sudo apt-get install python3-pip
+          pip3 install markdown\<3.0.0 pygments
+
+      - name: Checkout sources branch
+        uses: actions/checkout@v4
         with:
           ref: sources
           path: sources
 
-      - uses: actions/checkout@v4
+      - name: Checkout generator branch
+        uses: actions/checkout@v4
         with:
           ref: generator
           path: generator