Resolving dependencies...
Warning: The following packages are likely to be broken by the reinstalls:
parsec-3.1.13.0
Cabal-2.4.0.1
Continuing even though the plan contains dangerous reinstalls.
Starting     clock-0.8
Starting     safe-0.3.19
Starting     hashable-1.3.0.0
Starting     transformers-0.5.6.2
Building     clock-0.8
Building     safe-0.3.19
Building     hashable-1.3.0.0
Building     transformers-0.5.6.2
Completed    clock-0.8
Starting     extra-1.7.7
Building     extra-1.7.7
Completed    hashable-1.3.0.0
Starting     unordered-containers-0.2.12.0
Completed    safe-0.3.19
Building     unordered-containers-0.2.12.0
Completed    extra-1.7.7
Completed    transformers-0.5.6.2
Starting     writer-cps-transformers-0.5.6.1
Starting     mtl-2.2.2
Building     writer-cps-transformers-0.5.6.1
Building     mtl-2.2.2
Completed    writer-cps-transformers-0.5.6.1
Completed    unordered-containers-0.2.12.0
Completed    mtl-2.2.2
Starting     writer-cps-mtl-0.1.1.6
Building     writer-cps-mtl-0.1.1.6
Completed    writer-cps-mtl-0.1.1.6
Downloading  intro-0.9.0.0
Downloaded   intro-0.9.0.0
Starting     intro-0.9.0.0
Building     intro-0.9.0.0
Completed    intro-0.9.0.0