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     colour-2.3.5
Starting     cabal-doctest-1.0.8
Building     colour-2.3.5
Building     cabal-doctest-1.0.8
Completed    cabal-doctest-1.0.8
Completed    colour-2.3.5
Starting     ansi-terminal-0.10.3
Building     ansi-terminal-0.10.3
Completed    ansi-terminal-0.10.3
Downloading  pretty-simple-3.2.2.0
Downloaded   pretty-simple-3.2.2.0
Starting     pretty-simple-3.2.2.0
Building     pretty-simple-3.2.2.0
Completed    pretty-simple-3.2.2.0