Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hpaco (user goal)
rejecting: hpaco-0.28.0.5, hpaco-0.28.0.4, hpaco-0.28.0.3, hpaco-0.28.0.2,
hpaco-0.28.0.1, hpaco-0.28.0.0 (constraint from user target requires
==0.26.0.0)
trying: hpaco-0.26.0.0
trying: aeson-1.0.2.1 (dependency of hpaco-0.26.0.0)
next goal: hpaco-lib (dependency of hpaco-0.26.0.0)
rejecting: hpaco-lib-0.28.0.5, hpaco-lib-0.28.0.4, hpaco-lib-0.28.0.3,
hpaco-lib-0.28.0.2, hpaco-lib-0.28.0.1, hpaco-lib-0.28.0.0 (conflict: hpaco =>
hpaco-lib==0.26.0.0)
rejecting: hpaco-lib-0.26.0.0 (conflict: aeson==1.0.2.1, hpaco-lib =>
aeson>=0.6 && <1.0)
rejecting: hpaco-lib-0.25.2.0, hpaco-lib-0.24.1.0, hpaco-lib-0.24.0.0,
hpaco-lib-0.22.4.0, hpaco-lib-0.22.0.0, hpaco-lib-0.18.0.0,
hpaco-lib-0.16.2.0, hpaco-lib-0.16.1.0, hpaco-lib-0.11.0.6 (conflict: hpaco =>
hpaco-lib==0.26.0.0)
Backjump limit reached (currently 2000, change with --max-backjumps or try to
run with --reorder-goals).