diff --git a/.github/workflows/ports_zephyr.yml b/.github/workflows/ports_zephyr.yml
index d075582f30..444b0973da 100644
--- a/.github/workflows/ports_zephyr.yml
+++ b/.github/workflows/ports_zephyr.yml
@@ -20,6 +20,15 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+    - uses: jlumbroso/free-disk-space@main
+      with:
+        # Only free up a few things so this step runs quickly.
+        android: false
+        dotnet: true
+        haskell: true
+        large-packages: false
+        docker-images: false
+        swap-storage: false
     - uses: actions/checkout@v4
     - name: Install packages
       run: source tools/ci.sh && ci_zephyr_setup