Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] next goal: gi-javascriptcore (user goal)
[__0] rejecting: gi-javascriptcore-6.0.5, gi-javascriptcore-6.0.4,
gi-javascriptcore-6.0.3 (constraint from user target requires ==4.0.29)
[__0] trying: gi-javascriptcore-4.0.29
[__1] next goal: gi-javascriptcore4 (dependency of gi-javascriptcore)
[__1] rejecting: gi-javascriptcore4-4.0.29 (conflict: pkg-config package
javascriptcoregtk-4.0-any, not found in the pkg-config database)
[__1] fail (backjumping, conflict set: gi-javascriptcore, gi-javascriptcore4)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-javascriptcore, gi-javascriptcore4