Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: cpphs (user goal)
rejecting: cpphs-1.19.3, 1.19.2, 1.19, 1.18.9, 1.18.8, 1.18.7, 1.18.6, 1.18.5,
1.18.4, 1.18.3, 1.18.2, 1.18.1, 1.18, 1.17.1, 1.17, 1.16, 1.15, 1.14, 1.13.3,
1.13.2, 1.13.1, 1.12, 1.11, 1.10, 1.9, 1.8, 1.7, 1.6, 1.5, 1.3 (global
constraint requires ==1.19.1)
trying: cpphs-1.19.1
next goal: base (dependency of cpphs-1.19.1)
rejecting: base-4.8.1.0/installed-4f7... (conflict: cpphs => base<0)
rejecting: base-4.8.1.0, 4.8.0.0, 4.7.0.2, 4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0,
4.5.1.0, 4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1,
4.2.0.0, 4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global constraint requires
installed instance)
Dependency tree exhaustively searched.