Here's another issue I ran into when I tried to build contrib modules shipped with PostgreSQL project: ... Building contrib make -f Makefile -j1 Makefile:5: ../src/Makefile.global: No such file or directory make: *** No rule to make target '../src/Makefile.global'. Stop. Command '['/bin/sh', '/tmp/tmpxgmn5skk', 'make', '-f', 'Makefile', '-j1']' returned non-zero exit status 2 It seems like make plugin fails to include a Makefile that is referenced as a relative path from the main Makefile. Corresponding snapcraft.yaml section looks like this: contrib: plugin: make source: parts/postgresql/src/contrib/ after: - postgresql