Resolving dependencies...
cabal.exe: Could not resolve dependencies:
[__0] trying: twremat-0.1.0.0 (user goal)
[__1] next goal: base (dependency of twremat)
[__1] rejecting: base-4.15.0.0/installed-4.15.0.0 (conflict: twremat =>
base>=4.12.0.0 && <4.15.0.0)
[__1] skipping: base-4.15.0.0 (has the same characteristics that caused the
previous version to fail: excluded by constraint '>=4.12.0.0 && <4.15.0.0'
from 'twremat')
[__1] rejecting: base-4.14.1.0, base-4.14.0.0, base-4.13.0.0, base-4.12.0.0,
base-4.11.1.0, base-4.11.0.0, base-4.10.1.0, base-4.10.0.0, base-4.9.1.0,
base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0, base-4.7.0.2,
base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0, base-4.5.1.0,
base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0, base-4.3.0.0,
base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0, base-4.0.0.0,
base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable package requires
installed instance)
[__1] fail (backjumping, conflict set: base, twremat)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, twremat

I've got absolutely no clue how to get the cabal command to work, is there a specific version of everything that I need to install? I'm on Windows if that helps.