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     erf-2.0.0.0
Starting     primitive-0.6.4.0
Building     erf-2.0.0.0
Building     primitive-0.6.4.0
Completed    erf-2.0.0.0
Starting     random-1.1
Building     random-1.1
Completed    random-1.1
Completed    primitive-0.6.4.0
Starting     tf-random-0.5
Building     tf-random-0.5
Completed    tf-random-0.5
Starting     QuickCheck-2.12.6.1
Building     QuickCheck-2.12.6.1
Completed    QuickCheck-2.12.6.1
Downloading  HCL-1.7
Downloaded   HCL-1.7
Starting     HCL-1.7
Building     HCL-1.7
Completed    HCL-1.7