Conan recipes not ready for conan2
Conan 2.0 has just been release.
However, at least the recipe for proposal
is not yet Conan 2.0 compatible.
I will try to fix this asap.
I don't know whether this issue also affect other recipes (at least the big ones such as boost
will definitely be compatible), so we should check this as well.
As long as this issue is open, people need to use version 1.x of Conan:
pip install --user conan==1.*