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
Building     StateVar-1.2
Completed    StateVar-1.2
Starting     contravariant-1.5.2
Building     contravariant-1.5.2
Completed    contravariant-1.5.2
Downloading  keera-hails-reactivevalues-0.5.0
Downloaded   keera-hails-reactivevalues-0.5.0
Starting     keera-hails-reactivevalues-0.5.0
Building     keera-hails-reactivevalues-0.5.0
Completed    keera-hails-reactivevalues-0.5.0