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     hashable-1.3.0.0
Starting     base-orphans-0.8.1
Starting     transformers-compat-0.6.5
Starting     primitive-0.7.0.0
Building     base-orphans-0.8.1
Building     transformers-compat-0.6.5
Building     hashable-1.3.0.0
Building     primitive-0.7.0.0
Completed    base-orphans-0.8.1
Completed    transformers-compat-0.6.5
Completed    hashable-1.3.0.0
Starting     unordered-containers-0.2.10.0
Building     unordered-containers-0.2.10.0
Completed    primitive-0.7.0.0
Starting     vector-0.12.0.3
Building     vector-0.12.0.3
Completed    unordered-containers-0.2.10.0
Completed    vector-0.12.0.3
Downloading  witherable-0.3.1
Downloaded   witherable-0.3.1
Starting     witherable-0.3.1
Building     witherable-0.3.1
Completed    witherable-0.3.1