Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: cpython-3.5.0 (user goal)
[__1] rejecting: cpython:-usepython38 (conflict: pkg-config package
python3-any, not found in the pkg-config database)
[__1] rejecting: cpython:+usepython38 (conflict: pkg-config package
python-3.8-any, not found in the pkg-config database)
[__1] fail (backjumping, conflict set: cpython, cpython:usepython38)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: cpython, cpython:usepython38