Resolving dependencies...
Downloading Monocle-0.0.1...
Configuring Monocle-0.0.1...
Building Monocle-0.0.1...
Preprocessing library Monocle-0.0.1...

Monocle/Core.hs:5:18:
    Could not find module `Data.Map'
    It is a member of the hidden package `containers-0.5.0.0'.
    Perhaps you need to add `containers' to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.
Failed to install Monocle-0.0.1
cabal: Error: some packages failed to install:
Monocle-0.0.1 failed during the building phase. The exception was:
ExitFailure 1