Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] next goal: gnutls (user goal)
[__0] rejecting: gnutls-0.3 (conflict: pkg-config package gnutls-any, not
found in the pkg-config database)
[__0] rejecting: gnutls-0.2, gnutls-0.1.6, gnutls-0.1.5, gnutls-0.1.4,
gnutls-0.1.3, gnutls-0.1.2, gnutls-0.1.1, gnutls-0.1 (constraint from user
target requires ==0.3)
[__0] fail (backjumping, conflict set: gnutls)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gnutls