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: cairo (user goal)
[__0] rejecting: cairo-0.13.6.0 (conflict: pkg-config package cairo>=1.2.0,
not found in the pkg-config database)
[__0] rejecting: cairo-0.13.5.0, cairo-0.13.4.2, cairo-0.13.4.1,
cairo-0.13.4.0, cairo-0.13.3.1, cairo-0.13.3.0, cairo-0.13.2.0,
cairo-0.13.1.1, cairo-0.13.1.0, cairo-0.13.0.6, cairo-0.13.0.5,
cairo-0.13.0.4, cairo-0.13.0.3, cairo-0.13.0.2, cairo-0.13.0.1,
cairo-0.13.0.0, cairo-0.12.5.3, cairo-0.12.5.1, cairo-0.12.5.0, cairo-0.12.4,
cairo-0.12.3.1, cairo-0.12.3, cairo-0.12.2, cairo-0.12.1, cairo-0.12.0,
cairo-0.11.1, cairo-0.11.0 (constraint from user target requires ==0.13.6.0)
[__0] fail (backjumping, conflict set: cairo)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: cairo