Warning: The install command is a part of the legacy v1 style of cabal usage.

Please switch to using either the new project style and the new-install
command or the legacy v1-install alias as new-style projects will become the
default in the next version of cabal-install. Please file a bug if you cannot
replicate a working v1- use case with the new-style commands.

For more information, see: https://wiki.haskell.org/Cabal/NewBuild

Resolving dependencies...
Starting     clock-0.7.2
Starting     dlist-0.8.0.5
Building     clock-0.7.2
Building     dlist-0.8.0.5
Completed    clock-0.7.2
Starting     hashable-1.2.7.0
Building     hashable-1.2.7.0
Completed    dlist-0.8.0.5
Starting     safe-0.3.17
Building     safe-0.3.17
Completed    hashable-1.2.7.0
Starting     writer-cps-transformers-0.1.1.4
Completed    safe-0.3.17
Starting     extra-1.6.13
Building     writer-cps-transformers-0.1.1.4
Building     extra-1.6.13
Completed    writer-cps-transformers-0.1.1.4
Starting     unordered-containers-0.2.9.0
Building     unordered-containers-0.2.9.0
Completed    extra-1.6.13
Starting     writer-cps-mtl-0.1.1.5
Building     writer-cps-mtl-0.1.1.5
Completed    writer-cps-mtl-0.1.1.5
Completed    unordered-containers-0.2.9.0
Downloading  intro-0.5.2.1
Downloaded   intro-0.5.2.1
Starting     intro-0.5.2.1
Building     intro-0.5.2.1
Completed    intro-0.5.2.1