Resolving dependencies...
cabal: Could not resolve dependencies:
trying: ansi-terminal-0.7 (dependency of hspec-core-2.4.4)
trying: optparse-applicative-0.14.0.0 (dependency of wai-app-static-3.1.6.1)
next goal: ansi-wl-pprint (dependency of optparse-applicative-0.14.0.0)
rejecting: ansi-wl-pprint-0.6.8.1, ansi-wl-pprint-0.6.8,
ansi-wl-pprint-0.6.7.3, ansi-wl-pprint-0.6.7.2, ansi-wl-pprint-0.6.7.1,
ansi-wl-pprint-0.6.7, ansi-wl-pprint-0.6.6 (conflict: ansi-terminal==0.7,
ansi-wl-pprint => ansi-terminal>=0.4.0 && <0.7)
rejecting: ansi-wl-pprint-0.6.4, ansi-wl-pprint-0.6.3, ansi-wl-pprint-0.6.2,
ansi-wl-pprint-0.6.1, ansi-wl-pprint-0.5.1, ansi-wl-pprint-0.5.0,
ansi-wl-pprint-0.4.0, ansi-wl-pprint-0.3.1, ansi-wl-pprint-0.3.0,
ansi-wl-pprint-0.2, ansi-wl-pprint-0.1 (conflict: optparse-applicative =>
ansi-wl-pprint>=0.6.6 && <0.7)
Backjump limit reached (currently 2000, change with --max-backjumps or try to
run with --reorder-goals).