# Pin Gradle daemon JVM to Java 21 (system default may be 25 which is unsupported by Gradle 8.9). # To build: JAVA_HOME=/usr/lib/jvm/openjdk-bin-21 ./gradlew jar # Or install Gradle 8.13+ which supports Java 25. org.gradle.java.home=/usr/lib/jvm/openjdk-bin-21