Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: happstack (user goal)
rejecting: happstack-7.0.2, 7.0.1, 7.0.0, 6.1.8, 6.1.7, 6.0.6, 6.0.5, 6.0.4,
6.0.3, 6.0.2, 6.0.1, 6.0.0, 0.5.0.3, 0.5.0.2, 0.5.0, 0.4.1, 0.3.2 (global
constraint requires ==0.3.1)
trying: happstack-0.3.1
trying: base-4.7.0.1/installed-e4b... (dependency of happstack-0.3.1)
next goal: hsp (dependency of happstack-0.3.1)
rejecting: hsp-0.10.0, 0.9.2, 0.9.1, 0.9.0, 0.8.0, 0.7.3, 0.7.2, 0.7.1, 0.7.0,
0.6.1, 0.6.0, 0.5.2, 0.5.1, 0.5.0 (conflict: happstack => hsp>=0.4.5 && <0.5)
rejecting: hsp-0.4.5 (conflict: base==4.7.0.1/installed-e4b..., hsp => base>3
&& <4)
rejecting: hsp-0.4.4, 0.4, 0.2 (conflict: happstack => hsp>=0.4.5 && <0.5)
Dependency tree exhaustively searched.