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: wrecker-1.3.2.0 (user goal)
[__1] trying: stm-2.5.0.0/installed-2.5... (dependency of wrecker)
[__2] next goal: next-ref (dependency of wrecker)
[__2] rejecting: next-ref-0.1.0.2 (conflict: stm==2.5.0.0/installed-2.5...,
next-ref => stm>=2.2 && <2.5)
[__2] rejecting: next-ref-0.1.0.1, next-ref-0.1.0.0 (conflict:
stm==2.5.0.0/installed-2.5..., next-ref => stm>=2.4.4.1 && <2.5)
[__2] fail (backjumping, conflict set: next-ref, stm, wrecker)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: wrecker, base, stm, next-ref