Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: hq (user goal)
[__0] rejecting: hq-0.1.0.11 (conflict: pkg-config package gsl-any, not found
in the pkg-config database)
[__0] rejecting: hq-0.1.0.10, hq-0.1.0.9, hq-0.1.0.8, hq-0.1.0.7, hq-0.1.0.6,
hq-0.1.0.5, hq-0.1.0.4, hq-0.1.0.3, hq-0.1.0.2, hq-0.1.0.1, hq-0.1.0.0
(constraint from user target requires ==0.1.0.11)
[__0] fail (backjumping, conflict set: hq)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: hq