When a snapcraft.yaml excludes a file with the stage keyword, but includes it with the prime keyword, a FileNotFoundError exception is raised. To reproduce: mkdir test cd test touch conflict-file Download the attached snapcraft.yaml file and save it in the test directory Run snapcraft [...] FileNotFoundError: [Errno 2] No such file or directory: '/home/ubuntu/tmp/test/stage/conflict-file' -> '/home/ubuntu/tmp/test/prime/conflict-file' [...] Full log: http://paste.ubuntu.com/26031810/