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     hashable-1.3.0.0
Starting     syb-0.7.1
Starting     ghc-lib-parser-8.8.1.20191204
Building     hashable-1.3.0.0
Building     syb-0.7.1
Building     ghc-lib-parser-8.8.1.20191204
Completed    hashable-1.3.0.0
Starting     unordered-containers-0.2.10.0
Completed    syb-0.7.1
Building     unordered-containers-0.2.10.0
Completed    unordered-containers-0.2.10.0
Starting     uniplate-1.6.12
Building     uniplate-1.6.12
Completed    uniplate-1.6.12
Completed    ghc-lib-parser-8.8.1.20191204
Downloading  ghc-lib-parser-ex-8.8.1.20191204
Downloaded   ghc-lib-parser-ex-8.8.1.20191204
Starting     ghc-lib-parser-ex-8.8.1.20191204
Building     ghc-lib-parser-ex-8.8.1.20191204
Completed    ghc-lib-parser-ex-8.8.1.20191204