Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: liboath-hs (user goal)
[__0] rejecting: liboath-hs-0.0.1.2 (conflict: pkg-config package liboath==2.0
|| >2.0, not found in the pkg-config database)
[__0] rejecting: liboath-hs-0.0.1.1, liboath-hs-0.0.1.0 (constraint from user
target requires ==0.0.1.2)
[__0] fail (backjumping, conflict set: liboath-hs)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: liboath-hs