Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: xcffib (user goal)
rejecting: xcffib-0.3.6, 0.3.5, 0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.3.0, 0.2.5,
0.2.4, 0.2.2, 0.2.1, 0.2.0 (global constraint requires ==0.1.5)
trying: xcffib-0.1.5
next goal: xcb-types (dependency of xcffib-0.1.5)
rejecting: xcb-types-0.7.0, 0.6.3, 0.6.2, 0.6.1, 0.6.0, 0.5.1.1, 0.5.1, 0.5.0,
0.4.0, 0.3.0, 0.2.0, 0.1.0 (conflict: xcffib => xcb-types>=0.7.1)
Dependency tree exhaustively searched.