Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: Crypto (user goal)
rejecting: Crypto-4.2.5.1, Crypto-4.2.5, Crypto-4.2.4, Crypto-4.2.3,
Crypto-4.2.2, Crypto-4.2.1, Crypto-4.2.0, Crypto-4.1.0 (constraint from user
target requires ==3.0.3)
trying: Crypto-3.0.3
trying: base-4.9.0.0/installed-4.9... (dependency of Crypto-3.0.3)
next goal: NewBinary (dependency of Crypto-3.0.3)
rejecting: NewBinary-0.2.1 (conflict: base==4.9.0.0/installed-4.9...,
NewBinary => base<=4)
rejecting: NewBinary-0.1.1, NewBinary-0.1 (conflict:
base==4.9.0.0/installed-4.9..., NewBinary => base<3)
Dependency tree exhaustively searched.