Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: purescript (user goal)
rejecting: purescript-0.7.6.1, 0.7.5.4, 0.7.5.3, 0.7.5.2, 0.7.5.1, 0.7.5,
0.7.4.1, 0.7.3.0, 0.7.2.1, 0.7.2.0, 0.7.1.0, 0.7.0.0, 0.6.9.5, 0.6.9.4,
0.6.9.3, 0.6.9.2, 0.6.9.1 (global constraint requires ==0.6.9)
trying: purescript-0.6.9
next goal: base (dependency of purescript-0.6.9)
rejecting: base-4.8.1.0/installed-4f7... (conflict: purescript => 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.