The following snapcraft.yaml section gives a file conflict error ("Parts 'part1' and 'part2' have the following file paths in common which have different contents"): parts: part1: plugin: dump source: ./src1 organize: '*': opt/ stage: - -opt/commonfile.txt part2: plugin: dump source: ./src2 organize: '*': opt/ stage: - -opt/commonfile.txt However, when both stage keywords are changed to stage: - -commonfile.txt no errors are given, but commonfile.txt is copied into stage (with the later one overwriting the first). See attachment for full example.