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     haddock-library-1.7.0
Starting     colour-2.3.4
Starting     prettyprinter-1.2.1
Building     colour-2.3.4
Building     prettyprinter-1.2.1
Building     haddock-library-1.7.0
Completed    haddock-library-1.7.0
Completed    prettyprinter-1.2.1
Completed    colour-2.3.4
Starting     ansi-terminal-0.9
Building     ansi-terminal-0.9
Completed    ansi-terminal-0.9
Starting     prettyprinter-ansi-terminal-1.1.1.2
Building     prettyprinter-ansi-terminal-1.1.1.2
Completed    prettyprinter-ansi-terminal-1.1.1.2
Downloading  pretty-ghci-0.1.0.0
Downloaded   pretty-ghci-0.1.0.0
Starting     pretty-ghci-0.1.0.0
Building     pretty-ghci-0.1.0.0
Completed    pretty-ghci-0.1.0.0