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     transformers-compat-0.6.5
Starting     base-orphans-0.8.1
Building     base-orphans-0.8.1
Building     transformers-compat-0.6.5
Completed    base-orphans-0.8.1
Completed    transformers-compat-0.6.5
Starting     transformers-base-0.4.5.2
Starting     exceptions-0.10.3
Building     transformers-base-0.4.5.2
Building     exceptions-0.10.3
Completed    transformers-base-0.4.5.2
Starting     monad-control-1.0.2.3
Building     monad-control-1.0.2.3
Completed    exceptions-0.10.3
Completed    monad-control-1.0.2.3
Downloading  fvars-1.0.0.0
Downloaded   fvars-1.0.0.0
Starting     fvars-1.0.0.0
Building     fvars-1.0.0.0
Completed    fvars-1.0.0.0