Resolving dependencies... cabal: Could not resolve dependencies: next goal: angel (user goal) rejecting: angel-0.6.2, 0.6.1, 0.6.0, 0.5.2, 0.5.1, 0.5.0 (global constraint requires ==0.4.4) trying: angel-0.4.4 trying: base-4.8.1.0/installed-4f7... (dependency of angel-0.4.4) trying: configurator-0.3.0.0 (dependency of angel-0.4.4) trying: directory-1.2.2.0/installed-258... (dependency of configurator-0.3.0.0) next goal: process (dependency of angel-0.4.4) rejecting: process-1.2.3.0/installed-f02..., 1.3.0.0, 1.2.3.0, 1.2.2.0, 1.2.1.0, 1.2.0.0 (conflict: angel => process>=1.0 && <1.2) rejecting: process-1.1.0.2 (conflict: directory => filepath==1.4.0.0/installed-8fe..., process => filepath>=1.1 && <1.4) rejecting: process-1.1.0.1, 1.1.0.0, 1.0.1.5, 1.0.1.4 (conflict: directory==1.2.2.0/installed-258..., process => directory>=1.0 && <1.2) rejecting: process-1.0.1.3, 1.0.1.2, 1.0.1.1 (conflict: directory==1.2.2.0/installed-258..., process => directory>=1.0 && <1.1) rejecting: process-1.0.0.0 (conflict: base==4.8.1.0/installed-4f7..., process => base<4.3) Backjump limit reached (change with --max-backjumps).