Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: dbmigrations (user goal)
rejecting: dbmigrations-0.9.1, 0.9, 0.8.2, 0.8.1, 0.8, 0.7, 0.6, 0.5, 0.3,
0.2, 0.1.2, 0.1.1 (global constraint requires ==0.1)
trying: dbmigrations-0.1
trying: base-4.8.1.0/installed-4f7... (dependency of dbmigrations-0.1)
next goal: fgl (dependency of dbmigrations-0.1)
rejecting: fgl-5.5.2.3, 5.5.2.2, 5.5.2.1, 5.5.2.0, 5.5.1.0, 5.5.0.1, 5.5.0.0
(conflict: dbmigrations => fgl>=5.4 && <5.5)
rejecting: fgl-5.4.2.4 (conflict: base==4.8.1.0/installed-4f7..., fgl =>
base<4.8)
rejecting: fgl-5.4.2.3, 5.4.2.2 (conflict: base==4.8.1.0/installed-4f7..., fgl
=> base<4.4)
rejecting: fgl-5.4.2.0, 5.4.1.1 (conflict: base==4.8.1.0/installed-4f7..., fgl
=> base<4.8)
rejecting: fgl-5.3 (conflict: dbmigrations => fgl>=5.4 && <5.5)
Dependency tree exhaustively searched.