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     StateVar-1.2
Starting     transformers-compat-0.6.5
Starting     bytestring-0.10.10.0
Starting     containers-0.6.2.1
Building     StateVar-1.2
Building     transformers-compat-0.6.5
Building     containers-0.6.2.1
Building     bytestring-0.10.10.0
Completed    StateVar-1.2
Starting     contravariant-1.5.2
Building     contravariant-1.5.2
Completed    transformers-compat-0.6.5
Starting     mmorph-1.1.3
Building     mmorph-1.1.3
Completed    contravariant-1.5.2
Completed    mmorph-1.1.3
Completed    bytestring-0.10.10.0
Completed    containers-0.6.2.1
Starting     binary-0.8.8.0
Building     binary-0.8.8.0
Completed    binary-0.8.8.0
Starting     text-1.2.4.0
Building     text-1.2.4.0
Completed    text-1.2.4.0
Downloading  contracheck-applicative-0.1.0.0
Downloaded   contracheck-applicative-0.1.0.0
Starting     contracheck-applicative-0.1.0.0
Building     contracheck-applicative-0.1.0.0
Completed    contracheck-applicative-0.1.0.0