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     semigroups-0.19.1
Starting     void-0.7.3
Starting     transformers-compat-0.6.5
Building     void-0.7.3
Building     transformers-compat-0.6.5
Building     semigroups-0.19.1
Completed    void-0.7.3
Completed    semigroups-0.19.1
Completed    transformers-compat-0.6.5
Starting     mmorph-1.1.3
Starting     exceptions-0.10.3
Building     mmorph-1.1.3
Building     exceptions-0.10.3
Completed    mmorph-1.1.3
Completed    exceptions-0.10.3
Downloading  pipes-4.3.12
Downloaded   pipes-4.3.12
Starting     pipes-4.3.12
Building     pipes-4.3.12
Completed    pipes-4.3.12