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     cabal-doctest-1.0.8
Starting     data-default-class-0.1.2.0
Starting     primitive-0.7.0.0
Building     data-default-class-0.1.2.0
Building     cabal-doctest-1.0.8
Building     primitive-0.7.0.0
Completed    data-default-class-0.1.2.0
Completed    cabal-doctest-1.0.8
Completed    primitive-0.7.0.0
Starting     vector-0.12.0.3
Building     vector-0.12.0.3
Completed    vector-0.12.0.3
Downloading  Color-0.1.0
Downloaded   Color-0.1.0
Starting     Color-0.1.0
Building     Color-0.1.0
Completed    Color-0.1.0