Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] trying: ogma-core-1.3.0 (user goal)
[__1] trying: ogma-spec-1.3.0 (dependency of ogma-core)
[__2] next goal: ogma-language-jsonspec (dependency of ogma-core)
[__2] rejecting: ogma-language-jsonspec-1.3.0 (conflict: ogma-spec==1.3.0,
ogma-language-jsonspec => ogma-spec>=1.2.0 && <1.3)
[__2] skipping: ogma-language-jsonspec-1.2.0 (has the same characteristics
that caused the previous version to fail: excludes 'ogma-spec' version 1.3.0)
[__2] fail (backjumping, conflict set: ogma-core, ogma-language-jsonspec,
ogma-spec)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: ogma-core, ogma-spec,
ogma-language-jsonspec