### Bug Description Maven plugin tries to use staged Java runtime instead of the one installed as the build package. This causes a subsequent build failure due to runtime missing necessary modules to compile Java files. ### To Reproduce 1. rockcraft pack Build succeeds 3. rockcraft pack Build fails ### part yaml ```shell name: maven-sample-chisel version: 0.0.1 summary: Sample Maven-based chiselled rock description: | This image is a sample maven application using openjdk-21-jre-headless slices base: bare build-base: ubuntu@24.04 run-user: _daemon_ platforms: amd64: services: test: override: replace summary: Service summary command: /usr/bin/java -jar /jars/sample-0.0.1-SNAPSHOT.jar startup: enabled parts: application: plugin: maven source: ./sample source-type: local build-packages: - maven - openjdk-21-jdk-headless runtime: plugin: nil source: https://github.com/vpa1977/chisel-releases source-type: git source-branch: 24.04-openjdk-21-jre-headless build-packages: - ca-certificates-java override-build: | chisel cut --release ./ --root ${CRAFT_PART_INSTALL} \ base-files_base openjdk-21-jre-headless_security \ openjdk-21-jre-headless_management \ openjdk-21-jre-headless_jfr mkdir -p ${CRAFT_PART_INSTALL}/etc/ssl/certs/java/ cp /etc/ssl/certs/java/cacerts ${CRAFT_PART_INSTALL}/etc/ssl/certs/java/cacerts java_bin=$(find ${CRAFT_PART_INSTALL} -name java -type f -executable) ln -s --relative $java_bin ${CRAFT_PART_INSTALL}/usr/bin/java ``` ### Relevant log output ```shell 2024-08-16 15:15:30.892 :: ## Plugin environment 2024-08-16 15:15:30.892 :: ## User environment 2024-08-16 15:15:30.892 :: 2024-08-16 15:15:29.753 plugin validation command: 'mvn --version' 2024-08-16 15:15:30.892 :: 2024-08-16 15:15:29.861 executed mvn --version with output Apache Maven 3.8.7 2024-08-16 15:15:30.892 :: Maven home: /usr/share/maven 2024-08-16 15:15:30.892 :: Java version: 21.0.4, vendor: Ubuntu, runtime: /root/stage/usr/lib/jvm/java-21-openjdk-amd64 2024-08-16 15:15:30.892 :: Default locale: en, platform encoding: UTF-8 2024-08-16 15:15:30.892 :: OS name: "linux", version: "6.8.0-40-generic", arch: "amd64", family: "unix" 2024-08-16 15:15:30.892 :: 2024-08-16 15:15:29.861 Executing PosixPath('/root/parts/application/run/build.sh') ```