Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: cpphs (user goal)
rejecting: cpphs-1.20.2, cpphs-1.20.1, cpphs-1.20, cpphs-1.19.3, cpphs-1.19.2,
cpphs-1.19, cpphs-1.18.9, cpphs-1.18.8, cpphs-1.18.7, cpphs-1.18.6,
cpphs-1.18.5, cpphs-1.18.4, cpphs-1.18.3, cpphs-1.18.2, cpphs-1.18.1,
cpphs-1.18, cpphs-1.17.1, cpphs-1.17, cpphs-1.16, cpphs-1.15, cpphs-1.14,
cpphs-1.13.3, cpphs-1.13.2, cpphs-1.13.1, cpphs-1.12, cpphs-1.11, cpphs-1.10,
cpphs-1.9, cpphs-1.8, cpphs-1.7, cpphs-1.6, cpphs-1.5, cpphs-1.3, cpphs-1.19.1
(constraint from user target requires ==1.13)
trying: cpphs-1.13
next goal: base (dependency of cpphs-1.13)
rejecting: base-4.9.0.0/installed-4.9... (conflict: cpphs => base<0)
rejecting: base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0,
base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0,
base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0,
base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0,
base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable
package requires installed instance)
Dependency tree exhaustively searched.