As 'python3' is scheduled to start pointing to that somewhere in June.
The dependency on 'sip' was changed to 08a26e4579
out of caution, but it seems to work fine with the new default sip.
This is the first version using setuptools-scm. Because we don't keep
enough git metadata to determine the version, we use
SETUPTOOLS_SCM_PRETEND_VERSION instead.
https://github.com/NixOS/nixpkgs/issues/41136
Because enaml 0.13.0 doesn't work with atom 0.7.0,
which is already in nixpkgs. 0.14.0 works again.
(`enaml/layout/strength_member.py` was calling `__init__`
on `Value` with 3 positional parameters, but atom 0.7.0
changed them to named ones, and enaml 0.14.0 is updated
accordingly).
Arnout Engelen