I think this was caused by the release of Snapcraft 4.4 recently which
might have different behaviour. The snap is missing a few python
packages/modules now, which were present when building earlier.
* Add missing Python packages
* Ensure libblas and liblapack can be found with an LD_LIBRARY_PATH
override.
* Rename reference to `python3.6` to `python3.8`.
Signed-off-by: Daniel Llewellyn <daniel@snapcraft.ninja>
Daniel Llewellyn