Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: dvda (user goal)
rejecting: dvda-0.4, 0.3.2.1, 0.3.2, 0.3.1, 0.3.0.1, 0.3, 0.2.2, 0.2.1, 0.2.0,
0.1.1 (global constraint requires ==0.1)
trying: dvda-0.1
trying: plugins-1.5.4.0 (dependency of dvda-0.1)
next goal: ghc (dependency of plugins-1.5.4.0)
rejecting: ghc-7.8.3/installed-4df... (conflict: ghc =>
containers==0.5.5.1/installed-23e..., dvda => containers>=0.4 && <0.5)
Dependency tree exhaustively searched.