Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: shakebook-0.7.0.0 (user goal)
[__1] trying: pandoc-2.9.2.1 (dependency of shakebook)
[__2] next goal: aeson (dependency of shakebook)
[__2] rejecting: aeson-1.5.2.0 (conflict: pandoc => aeson>=0.7 && <1.5)
[__2] skipping: aeson-1.5.1.0, aeson-1.5.0.0 (has the same characteristics
that caused the previous version to fail: excluded by constraint '>=0.7 &&
<1.5' from 'pandoc')
[__2] rejecting: aeson-1.4.7.1 (conflict: shakebook => aeson>=1.5.2.0)
[__2] skipping: aeson-1.4.7.0, aeson-1.4.6.0, aeson-1.4.5.0, aeson-1.4.4.0,
aeson-1.4.3.0, aeson-1.4.2.0, aeson-1.4.1.0, aeson-1.4.0.0, aeson-1.3.1.1,
aeson-1.3.1.0, aeson-1.3.0.0, aeson-1.2.4.0, aeson-1.2.3.0, aeson-1.2.2.0,
aeson-1.2.1.0, aeson-1.2.0.0, aeson-1.1.2.0, aeson-1.1.1.0, aeson-1.1.0.0,
aeson-1.0.2.1, aeson-1.0.2.0, aeson-1.0.1.0, aeson-1.0.0.0, aeson-0.11.3.0,
aeson-0.11.2.1, aeson-0.11.2.0, aeson-0.11.1.4, aeson-0.11.1.3,
aeson-0.11.1.2, aeson-0.11.1.1, aeson-0.11.1.0, aeson-0.11.0.0, aeson-0.9.0.1,
aeson-0.9.0.0, aeson-0.8.1.1, aeson-0.8.1.0, aeson-0.8.0.2, aeson-0.7.0.6,
aeson-0.7.0.4, aeson-0.6.2.1, aeson-0.6.2.0, aeson-0.6.1.0, aeson-0.6.0.2,
aeson-0.6.0.1, aeson-0.6.0.0, aeson-0.5.0.0, aeson-0.4.0.1, aeson-0.4.0.0,
aeson-0.3.2.14, aeson-0.3.2.13, aeson-0.3.2.12, aeson-0.3.2.11,
aeson-0.3.2.10, aeson-0.3.2.9, aeson-0.3.2.8, aeson-0.3.2.7, aeson-0.3.2.6,
aeson-0.3.2.5, aeson-0.3.2.4, aeson-0.3.2.3, aeson-0.3.2.2, aeson-0.3.2.1,
aeson-0.3.2.0, aeson-0.3.1.1, aeson-0.3.1.0, aeson-0.3.0.0, aeson-0.2.0.0,
aeson-0.1.0.0, aeson-0.10.0.0, aeson-0.8.0.1, aeson-0.8.0.0, aeson-0.7.0.5,
aeson-0.7.0.3, aeson-0.7.0.2, aeson-0.7.0.1, aeson-0.7.0.0 (has the same
characteristics that caused the previous version to fail: excluded by
constraint '>=1.5.2.0' from 'shakebook')
[__2] fail (backjumping, conflict set: aeson, pandoc, shakebook)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: pandoc, shakebook, aeson