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] trying: cpkg-0.2.2.0 (user goal)
[__1] next goal: libarchive (dependency of cpkg)
[__1] rejecting: libarchive-1.0.5.1, libarchive-1.0.5.0, libarchive-1.0.4.0
(conflict: pkg-config package libarchive-any, not found in the pkg-config
database)
[__1] rejecting: libarchive-1.0.3.0, libarchive-1.0.2.0, libarchive-1.0.1.0,
libarchive-1.0.0.0, libarchive-0.2.1.2, libarchive-0.2.1.1,
libarchive-0.2.1.0, libarchive-0.2.0.0, libarchive-0.1.0.0 (conflict: cpkg =>
libarchive>=1.0.4.0)
[__1] fail (backjumping, conflict set: cpkg, libarchive)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: cpkg, libarchive