Resolving dependencies... cabal: Could not resolve dependencies: trying: base-4.9.0.0/installed-4.9... (dependency of maid-2010.4.24) next goal: hyena (dependency of hack-handler-hyena-2010.3.15) rejecting: hyena-0.1.0.1 (conflict: containers==0.5.7.1/installed-0.5..., hyena => containers>=0.3 && <0.4) trying: hyena-0.1 next goal: mtl (dependency of hyena-0.1) rejecting: mtl-2.2.1, mtl-2.2.0.1, mtl-2.2, mtl-2.1.3.1, mtl-2.1.2, mtl-2.1.1, mtl-2.1, mtl-2.0.1.1, mtl-2.0.1.0, mtl-2.0.0.0 (conflict: hyena => mtl>=1 && <1.2) rejecting: mtl-1.1.1.1, mtl-1.1.1.0 (conflict: base==4.9.0.0/installed-4.9..., mtl => base<4.6) rejecting: mtl-1.1.0.2, mtl-1.1.0.1, mtl-1.1.0.0, mtl-1.0 (conflict: base==4.9.0.0/installed-4.9..., mtl => base<4.3) Dependency tree exhaustively searched.