Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: mangopay (user goal)
rejecting: mangopay-1.12, mangopay-1.11.5, mangopay-1.11.4, mangopay-1.11.3,
mangopay-1.11.2, mangopay-1.11.1, mangopay-1.11, mangopay-1.10.2,
mangopay-1.10.1, mangopay-1.10, mangopay-1.9.7, mangopay-1.9.6,
mangopay-1.9.5.1, mangopay-1.9.5, mangopay-1.9.4, mangopay-1.9.2,
mangopay-1.9.1, mangopay-1.9, mangopay-1.8.2, mangopay-1.8.1, mangopay-1.8.0,
mangopay-1.7.0, mangopay-1.6.3, mangopay-1.6.2, mangopay-1.6.1,
mangopay-1.6.0, mangopay-1.5.1, mangopay-1.5, mangopay-1.4, mangopay-1.3,
mangopay-1.2 (constraint from user target requires ==1.1)
trying: mangopay-1.1
trying: base-4.9.0.0/installed-4.9... (dependency of mangopay-1.1)
next goal: case-insensitive (dependency of mangopay-1.1)
rejecting: case-insensitive-1.2.0.7, case-insensitive-1.2.0.6,
case-insensitive-1.2.0.5, case-insensitive-1.2.0.4, case-insensitive-1.2.0.3,
case-insensitive-1.2.0.2, case-insensitive-1.2.0.1, case-insensitive-1.2.0.0
(conflict: mangopay => case-insensitive>=1.1.0 && <1.2)
rejecting: case-insensitive-1.1.0.3, case-insensitive-1.1.0.2,
case-insensitive-1.1.0.1 (conflict: base==4.9.0.0/installed-4.9...,
case-insensitive => base>=3 && <4.8)
rejecting: case-insensitive-1.1, case-insensitive-1.0.0.2,
case-insensitive-1.0.0.1, case-insensitive-1.0, case-insensitive-0.4.0.4,
case-insensitive-0.4.0.3, case-insensitive-0.4.0.2, case-insensitive-0.4.0.1,
case-insensitive-0.4, case-insensitive-0.3.0.1, case-insensitive-0.3,
case-insensitive-0.2.0.2, case-insensitive-0.2.0.1, case-insensitive-0.2,
case-insensitive-0.1 (conflict: mangopay => case-insensitive>=1.1.0 && <1.2)
Dependency tree exhaustively searched.