Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hackport (user goal)
rejecting: hackport-0.4.6, 0.4.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1, 0.4, 0.3.6,
0.3.5, 0.3.4, 0.3.3, 0.3.2 (global constraint requires ==0.3.1)
trying: hackport-0.3.1
trying: unix-2.7.1.0/installed-643... (dependency of hackport-0.3.1)
next goal: bytestring (dependency of unix-2.7.1.0/installed-643...)
rejecting: bytestring-0.10.6.0/installed-236... (conflict: bytestring =>
deepseq==1.4.1.1/installed-8fb..., hackport => deepseq>=1.3 && <1.4)
rejecting: bytestring-0.10.6.0, 0.10.4.1, 0.10.4.0, 0.10.2.0, 0.10.0.2,
0.10.0.1, 0.10.0.0, 0.9.2.1, 0.9.2.0, 0.9.1.10, 0.9.1.9, 0.9.1.8, 0.9.1.7,
0.9.1.6, 0.9.1.5, 0.9.1.4, 0.9.1.3, 0.9.1.2, 0.9.1.1, 0.9.1.0, 0.9.0.4,
0.9.0.3, 0.9.0.2, 0.9.0.1, 0.9 (conflict: unix =>
bytestring==0.10.6.0/installed-236...)
Dependency tree exhaustively searched.