diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 16a2d1b..1d52d36 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,8 +30,8 @@ jobs:
       - name: Build & check Trino
         run: |
           just install-dev-tools
-          (cd java/trino-plugin && . ~/.asdf/plugins/java/set-java-home.bash)
           (cd java/trino-plugin && java --version && mvn --version && echo "JAVA_HOME: $JAVA_HOME")
+          set -u JAVA_HOME
           just docker-run-trino
           just check-trino
           docker tag trino-joinery ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest