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: bustle (user goal)
[__0] rejecting: bustle-0.7.3 (conflict: pkg-config package glib-2.0>=2.54,
not found in the pkg-config database)
[__0] rejecting: bustle-0.7.2, bustle-0.7.1, bustle-0.6.2, bustle-0.6.1,
bustle-0.5.4, bustle-0.5.3, bustle-0.5.2, bustle-0.5.1, bustle-0.5.0,
bustle-0.4.8, bustle-0.4.7, bustle-0.4.6, bustle-0.4.5, bustle-0.4.4,
bustle-0.4.3 (constraint from user target requires ==0.7.3)
[__0] fail (backjumping, conflict set: bustle)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: bustle