Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: monte-carlo (user goal)
rejecting: monte-carlo-0.6.1, 0.6, 0.5, 0.4.2, 0.4.1 (global constraint
requires ==0.4)
trying: monte-carlo-0.4
trying: base-4.7.0.1/installed-e4b... (dependency of monte-carlo-0.4)
next goal: vector (dependency of monte-carlo-0.4)
rejecting: vector-0.10.12.3, 0.10.12.2, 0.10.12.1, 0.10.11.0, 0.10.10.0,
0.10.9.2, 0.10.9.1, 0.10.9.0, 0.10.0.1, 0.10, 0.9.1, 0.9, 0.8 (conflict:
monte-carlo => vector>=0.6 && <0.8)
trying: vector-0.7.1
next goal: primitive (dependency of vector-0.7.1)
rejecting: primitive-0.6, 0.5.4.0, 0.5.3.0, 0.5.2.1, 0.5.1.0, 0.5.0.1, 0.5,
0.4.1, 0.4.0.1, 0.4 (conflict: vector => primitive>=0.3.1 && <0.4)
rejecting: primitive-0.3.1 (conflict: base==4.7.0.1/installed-e4b...,
primitive => base>=4 && <4.7)
rejecting: primitive-0.3, 0.2.1, 0.2, 0.1 (conflict: vector =>
primitive>=0.3.1 && <0.4)
Dependency tree exhaustively searched.