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     type-equality-1
Starting     hashable-1.3.0.0
Starting     transformers-compat-0.6.5
Building     semigroups-0.19.1
Building     type-equality-1
Building     hashable-1.3.0.0
Building     transformers-compat-0.6.5
Completed    type-equality-1
Completed    semigroups-0.19.1
Completed    transformers-compat-0.6.5
Completed    hashable-1.3.0.0
Downloading  constraints-0.12
Downloaded   constraints-0.12
Starting     constraints-0.12
Building     constraints-0.12
Completed    constraints-0.12