Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hat (user goal)
rejecting: hat-2.8.0.0, 2.7.0.12, 2.7.0.11, 2.7.0.10, 2.7.0.9, 2.7.0.8,
2.7.0.7, 2.7.0.6 (global constraint requires ==2.7.0.5)
trying: hat-2.7.0.5
trying: base-4.7.0.1/installed-e4b... (dependency of hat-2.7.0.5)
next goal: directory (dependency of hat-2.7.0.5)
rejecting: directory-1.2.1.0/installed-4c4..., 1.2.2.1, 1.2.2.0, 1.2.1.0,
1.2.0.1, 1.2.0.0 (conflict: hat => directory==1.1.*)
rejecting: directory-1.1.0.2 (conflict: base==4.7.0.1/installed-e4b...,
directory => base>=4.4 && <4.6)
rejecting: directory-1.1.0.1 (conflict: base==4.7.0.1/installed-e4b...,
directory => base>=4.2 && <4.5)
rejecting: directory-1.1.0.0 (conflict: base==4.7.0.1/installed-e4b...,
directory => base>=4.2 && <4.4)
rejecting: directory-1.0.1.2, 1.0.1.1, 1.0.1.0, 1.0.0.3, 1.0.0.0 (conflict:
hat => directory==1.1.*)
Dependency tree exhaustively searched.