Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: clifford (user goal)
rejecting: clifford-0.1.0.14, 0.1.0.13, 0.1.0.12, 0.1.0.11, 0.1.0.10, 0.1.0.9,
0.1.0.8, 0.1.0.7 (global constraint requires ==0.1.0.6)
trying: clifford-0.1.0.6
trying: MemoTrie-0.6.3 (dependency of clifford-0.1.0.6)
trying: void-0.7.1 (dependency of MemoTrie-0.6.3)
trying: semigroups-0.18.0.1 (dependency of void-0.7.1)
trying: semigroups-0.18.0.1:+hashable
trying: semigroups-0.18.0.1:+unordered-containers
trying: semigroups-0.18.0.1:+text
trying: text-1.2.1.3 (dependency of semigroups-0.18.0.1:+text)
next goal: bytestring (dependency of text-1.2.1.3)
rejecting: bytestring-0.10.6.0/installed-236... (conflict: bytestring =>
deepseq==1.4.1.1/installed-8fb..., clifford => deepseq>=1.3.0.1 && <1.4)
trying: bytestring-0.10.6.0
trying: semigroups-0.18.0.1:+tagged
trying: semigroups-0.18.0.1:+deepseq
trying: semigroups-0.18.0.1:+containers
trying: semigroups-0.18.0.1:+bytestring
trying: hspec-2.2.0 (dependency of clifford-0.1.0.6)
trying: hspec-discover-2.2.0 (dependency of hspec-2.2.0)
trying: directory-1.2.2.0/installed-258... (dependency of
hspec-discover-2.2.0)
next goal: unix (dependency of directory-1.2.2.0/installed-258...)
rejecting: unix-2.7.1.0/installed-643... (conflict: bytestring==0.10.6.0, unix
=> bytestring==0.10.6.0/installed-236...)
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.