Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] next goal: cmark-gfm-lens (user goal)
[__0] rejecting: cmark-gfm-lens-0.2.0.0 (unsupported spec-version 3.12)
[__0] fail (backjumping, conflict set: cmark-gfm-lens)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: cmark-gfm-lens