Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: HsHyperEstraier (user goal)
rejecting: HsHyperEstraier-0.4, HsHyperEstraier-0.3.2.1,
HsHyperEstraier-0.3.2, HsHyperEstraier-0.3.1, HsHyperEstraier-0.3 (constraint
from user target requires ==0.2.1)
rejecting: HsHyperEstraier-0.2.1 (conflict: requires pkg-config package
hyperestraier>=1.4.9, not found in the pkg-config database)
rejecting: HsHyperEstraier-0.2, HsHyperEstraier-0.1 (constraint from user
target requires ==0.2.1)
Dependency tree exhaustively searched.