snapcraft.yaml: name: test-app version: dev summary: TODO summary description: TODO description base: core22 grade: devel confinement: devmode parts: app-jar: source: ./build/libs/ source-type: local plugin: dump stage-packages: - openjdk-17-jdk # TODO headless? apps: server: command: $JAVA_HOME/bin/java -jar app.jar environment: JAVA_HOME: $SNAP/usr/lib/jvm/java-17-openjdk-amd64 PATH: $JAVA_HOME/bin:$PATH Build output: Cannot pack snap file: Command '['snap', 'pack', '--filename', 'test-app_dev_amd64.snap', '--compression', 'xz', PosixPath('/root/prime'), PosixPath('/root/project')]' returned non-zero exit status 1. (2023/01/09 16:17:11.345666 container.go:215: in snap "test-app": path "$JAVA_HOME" does not exist 2023/01/09 16:17:11.345698 container.go:215: in snap "test-app": path "$JAVA_HOME/bin/java" does not exist 2023/01/09 16:17:11.345702 container.go:215: in snap "test-app": path "$JAVA_HOME/bin" does not exist error: cannot pack "/root/prime": snap is unusable due to missing files) Failed to execute pack in instance. Workaround: the command should not use environment variables. command: usr/lib/jvm/java-17-openjdk-amd64/bin/java -version Discussion: https://forum.snapcraft.io/t/simple-java-application/33429/13