Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: astrds (user goal)
rejecting: astrds-0.1.1 (global constraint requires ==0.1)
trying: astrds-0.1
trying: base-4.7.0.1/installed-e4b... (dependency of astrds-0.1)
next goal: mtl (dependency of astrds-0.1)
rejecting: mtl-2.2.1, 2.2.0.1, 2.2, 2.1.3.1, 2.1.2, 2.1.1, 2.1, 2.0.1.1,
2.0.1.0, 2.0.0.0 (conflict: astrds => mtl>=1.1 && <1.2)
rejecting: mtl-1.1.1.1, 1.1.1.0 (conflict: base==4.7.0.1/installed-e4b..., mtl
=> base<4.6)
rejecting: mtl-1.1.0.2, 1.1.0.1, 1.1.0.0 (conflict:
base==4.7.0.1/installed-e4b..., mtl => base<4.3)
rejecting: mtl-1.0 (conflict: astrds => mtl>=1.1 && <1.2)
Dependency tree exhaustively searched.