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     multiset-0.3.4.1
Starting     hashable-1.2.7.0
Building     multiset-0.3.4.1
Building     hashable-1.2.7.0
Completed    multiset-0.3.4.1
Starting     semigroups-0.18.5
Completed    hashable-1.2.7.0
Starting     transformers-compat-0.6.2
Building     semigroups-0.18.5
Building     transformers-compat-0.6.2
Completed    semigroups-0.18.5
Completed    transformers-compat-0.6.2
Starting     constraints-0.10.1
Building     constraints-0.10.1
Completed    constraints-0.10.1
Downloading  zsyntax-0.2.0.0
Downloaded   zsyntax-0.2.0.0
Starting     zsyntax-0.2.0.0
Building     zsyntax-0.2.0.0
Completed    zsyntax-0.2.0.0