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     data-hash-0.2.0.1
Starting     hashable-1.2.7.0
Starting     semigroups-0.18.5
Starting     syb-0.7
Building     hashable-1.2.7.0
Building     semigroups-0.18.5
Building     data-hash-0.2.0.1
Building     syb-0.7
Completed    semigroups-0.18.5
Starting     transformers-compat-0.6.4
Building     transformers-compat-0.6.4
Completed    data-hash-0.2.0.1
Starting     tree-view-0.5
Building     tree-view-0.5
Completed    hashable-1.2.7.0
Completed    syb-0.7
Completed    tree-view-0.5
Completed    transformers-compat-0.6.4
Starting     constraints-0.10.1
Building     constraints-0.10.1
Completed    constraints-0.10.1
Downloading  syntactic-3.8.1
Downloaded   syntactic-3.8.1
Starting     syntactic-3.8.1
Building     syntactic-3.8.1
Completed    syntactic-3.8.1