Specify snappy and LZ4 dependencies - right now they are totally absent from pyproject.toml, which makes them hard to discover.

[mykaul]

One more thing we could (and should!) do is to specify those dependencies - right now they are totally absent from pyproject.toml, which makes them hard to discover.
Those should be listed in [project.optional-dependencies] section. We could either make it a single extra, like compression = ['lz4', 'snappy'], or extra-per-lib, like

compression-snappy = ['snappy']
compression-lz4 = ['lz4']

Originally posted by @Lorak-mmk in #510 (comment)