Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: ghc-heap-view (user goal)
rejecting: ghc-heap-view-0.5.7, ghc-heap-view-0.5.6, ghc-heap-view-0.5.4,
ghc-heap-view-0.5.3, ghc-heap-view-0.5.2, ghc-heap-view-0.5.1,
ghc-heap-view-0.5.0.1, ghc-heap-view-0.5, ghc-heap-view-0.4.2.0,
ghc-heap-view-0.4.1.0, ghc-heap-view-0.4.0.0, ghc-heap-view-0.3.0.4,
ghc-heap-view-0.3.0.3 (constraint from user target requires ==0.3.0.2)
trying: ghc-heap-view-0.3.0.2
next goal: base (dependency of ghc-heap-view-0.3.0.2)
rejecting: base-4.9.0.0/installed-4.9... (conflict: ghc-heap-view =>
base==4.5.*)
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.