Resolving dependencies... cabal: Could not resolve dependencies: next goal: dephd (user goal) rejecting: dephd-0.1.6, 0.1.5, 0.1.4, 0.1.3, 0.1.1, 0.1 (global constraint requires ==0.0) trying: dephd-0.0 trying: directory-1.2.2.0/installed-258... (dependency of dephd-0.0) next goal: unix (dependency of directory-1.2.2.0/installed-258...) rejecting: unix-2.7.1.0/installed-643... (conflict: unix => bytestring==0.10.6.0/installed-236..., dephd => bytestring==0.9.0.1) rejecting: unix-2.7.1.0, 2.7.0.1, 2.7.0.0, 2.6.0.1, 2.6.0.0, 2.5.1.1, 2.5.1.0, 2.5.0.0, 2.4.2.0, 2.4.1.0, 2.4.0.2, 2.4.0.1, 2.4.0.0, 2.3.2.0, 2.3.1.0, 2.3.0.0, 2.2.0.0, 2.0 (conflict: directory => unix==2.7.1.0/installed-643...) Dependency tree exhaustively searched.