Resolving dependencies...
cabal: Could not resolve dependencies:
trying: HStringTemplate-0.7.3/installed-8e6... (user goal)
trying: Spock-worker-0.2.1.2 (user goal)
trying: Spock-0.7.5.1 (dependency of Spock-worker-0.2.1.2)
next goal: digestive-functors (dependency of Spock-0.7.5.1)
rejecting: digestive-functors-0.7.1.1, 0.7.1.0 (conflict: HStringTemplate =>
text==1.2.0.2/installed-ddc..., digestive-functors => text>=0.10 && <1.2)
rejecting: digestive-functors-0.7.0.0 (conflict: HStringTemplate =>
text==1.2.0.2/installed-ddc..., digestive-functors => text>=0.10 && <1.1)
rejecting: digestive-functors-0.6.2.0, 0.6.1.1, 0.6.1.0, 0.6.0.1, 0.6.0.0,
0.5.0.4, 0.5.0.3, 0.5.0.2, 0.5.0.1, 0.5.0.0, 0.4.1.2, 0.4.1.1, 0.4.1.0,
0.4.0.0, 0.3.2.1, 0.3.1.0, 0.3.0.2, 0.3.0.1, 0.3.0.0, 0.2.1.0, 0.2.0.1,
0.2.0.0, 0.1.0.2, 0.1.0.1, 0.1.0.0, 0.0.2.1, 0.0.2.0, 0.0.1 (conflict: Spock
=> digestive-functors>=0.7)
Backjump limit reached (change with --max-backjumps).

Note: when using a sandbox, all packages are required to have consistent
dependencies. Try reinstalling/unregistering the offending packages or
recreating the sandbox.