diff --git a/.forgejo/workflows/build.yml b/.forgejo/workflows/build.yml
index f20edd0..f87eb9f 100644
--- a/.forgejo/workflows/build.yml
+++ b/.forgejo/workflows/build.yml
@@ -6,6 +6,7 @@ jobs:
   "build":
     runs-on: "docker"
     container:
-      image: "alpine:latest"
+      image: "gradle:jdk21"
     steps:
-      - run: "echo Hello, world!"
+      - uses: "actions/checkout@v3"
+      - run: "./gradlew build"