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: boots-app-0.1.0.6 (user goal)
[__1] next goal: boots (dependency of boots-app)
[__1] rejecting: boots-0.1, boots-0.0.100, boots-0.0.3, boots-0.0.2,
boots-0.0.1, boots-0 (conflict: boots-app => boots>=0.1.1 && <0.2)
[__1] fail (backjumping, conflict set: boots, boots-app)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: boots-app, boots