diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index af212e19e..6bd6f7909 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -53,6 +53,7 @@ jobs:
           profile: mac
           launcher: launcher-mac.sh
     steps:
+      - uses: actions/checkout@v2
       - uses: actions/setup-java@v1
         with:
           java-version: 16