say you're installing the development build of mcomix

python3 -m pip install --user git+

(you're doing it as your own user because you don't want sweeping system changes for something like an unstable build of a comic book viewer)

but it won't compile due to weird and inscrutable errors

the Ubuntu packages you must first install are: libgirepository1.0-dev libcairo2-dev (yes, the development headers)

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