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     regex-applicative-0.3.3.1
Starting     util-0.1.14.1
Starting     Cabal-3.0.0.0
Building     regex-applicative-0.3.3.1
Building     util-0.1.14.1
Building     Cabal-3.0.0.0
Completed    util-0.1.14.1
Completed    regex-applicative-0.3.3.1
Completed    Cabal-3.0.0.0
Downloading  ucd-0.0.1.3
Downloaded   ucd-0.0.1.3
Starting     ucd-0.0.1.3
Building     ucd-0.0.1.3
Warning: /tmp/pkgConf-ucd-0.0.1.3-4701/pkgConf: .:3:1: Unknown field:
"visibility"
Completed    ucd-0.0.1.3