Today [1] sparc profiles were demoted from 'stable' to 'exp'

[1]: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=b5901d8f716555a1479f12313a2925fcadd177a9

"""
On 2017-09-10 council@ meeting majority decided to drop sparc@
from from 'stable' to 'exp' profiles. That means the following:

- maintainers are free to break dependency tree by removing old ebuilds
- repoman will stop checking for satisfied dependencies (unless '-e y' is passed)

Bug: https://bugs.gentoo.org/630258
"""

-- 

  Sergei