Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: scope (user goal)
rejecting: scope-0.8.0.1, 0.8.0.0, 0.7.0.0, 0.6.1.0, 0.6.0.0, 0.5.2.0, 0.5.1.0
(global constraint requires ==0.5.0.0)
trying: scope-0.5.0.0
trying: glib-0.13.1.0 (dependency of scope-0.5.0.0)
trying: bytestring-0.10.4.0/installed-9f4... (dependency of glib-0.13.1.0)
next goal: zoom-cache (dependency of scope-0.5.0.0)
rejecting: zoom-cache-1.2.1.6, 1.2.1.5, 1.2.1.4, 1.2.1.3, 1.2.1.2, 1.2.1.1,
1.2.1.0, 1.2.0.0, 1.1.0.0, 1.0.0.0, 0.9.1.0, 0.9.0.0 (conflict: scope =>
zoom-cache>=0.8.1.0 && <0.9)
rejecting: zoom-cache-0.8.1.0 (conflict:
bytestring==0.10.4.0/installed-9f4..., zoom-cache => bytestring>=0.9 && <0.10)
rejecting: zoom-cache-0.8.0.0, 0.7.0.0, 0.6.0.0, 0.5.1.0, 0.5.0.0, 0.4.0.0,
0.3.0.0, 0.2.1.1, 0.2.1.0, 0.2.0.0, 0.1.0.2, 0.1.0.1, 0.1.0.0 (conflict: scope
=> zoom-cache>=0.8.1.0 && <0.9)
Backjump limit reached (change with --max-backjumps).