diff --git a/.github/workflows/pypi-test.yml b/.github/workflows/pypi-test.yml
index cdc78d1..a63d13a 100644
--- a/.github/workflows/pypi-test.yml
+++ b/.github/workflows/pypi-test.yml
@@ -21,7 +21,7 @@ jobs:
         with:
           submodules: true
 
-      - name: "Install dependencies"
+      - name: "Install system dependencies"
         run: |
           sudo apt-get install zlib1g-dev
 
@@ -88,6 +88,12 @@ jobs:
         with:
           submodules: true
 
+      - name: Download rds2cpp deps
+        run: |
+          cd extern/rds2cpp
+          cmake .
+          cd ../..
+
       - name: Build wheels
         uses: pypa/cibuildwheel@v2.12.1
         env:
@@ -108,6 +114,12 @@ jobs:
         with:
           submodules: true
 
+      - name: Download rds2cpp deps
+        run: |
+          cd extern/rds2cpp
+          cmake .
+          cd ../..
+
       - name: Build sdist
         run: pipx run build --sdist