2019-01-01 01:47:09.824202184 UTC
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
cabal: Could not resolve dependencies:
[__0] next goal: libretls (user goal)
[__0] rejecting: libretls-0.0.0.0 (conflict: pkg-config package libtls>=2.4.4,
not found in the pkg-config database)
[__0] fail (backjumping, conflict set: libretls)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: libretls