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...
cabal: Could not resolve dependencies:
[__0] next goal: gi-handy (user goal)
[__0] rejecting: gi-handy-0.0.5 (conflict: pkg-config package
libhandy-0.0-any, not found in the pkg-config database)
[__0] rejecting: gi-handy-0.0.4, gi-handy-0.0.3, gi-handy-0.0.2,
gi-handy-0.0.1 (constraint from user target requires ==0.0.5)
[__0] fail (backjumping, conflict set: gi-handy)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-handy