Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: gi-javascriptcore (user goal)
rejecting: gi-javascriptcore-4.0.15 (conflict: requires pkg-config package
javascriptcoregtk-4.0-any, not found in the pkg-config database)
rejecting: gi-javascriptcore-4.0.14, gi-javascriptcore-4.0.13,
gi-javascriptcore-4.0.12, gi-javascriptcore-4.0.11, gi-javascriptcore-4.0.10,
gi-javascriptcore-4.0.9, gi-javascriptcore-4.0.8, gi-javascriptcore-4.0.7,
gi-javascriptcore-4.0.6, gi-javascriptcore-4.0.5, gi-javascriptcore-4.0.4,
gi-javascriptcore-4.0.3, gi-javascriptcore-4.0.2, gi-javascriptcore-4.0.1,
gi-javascriptcore-3.0.15, gi-javascriptcore-3.0.14, gi-javascriptcore-3.0.13,
gi-javascriptcore-3.0.12, gi-javascriptcore-3.0.11, gi-javascriptcore-3.0.10,
gi-javascriptcore-3.0.9, gi-javascriptcore-3.0.8, gi-javascriptcore-3.0.7,
gi-javascriptcore-3.0.6, gi-javascriptcore-3.0.5, gi-javascriptcore-3.0.4,
gi-javascriptcore-3.0.3, gi-javascriptcore-3.0.2, gi-javascriptcore-3.0.1,
gi-javascriptcore-0.2.12.15, gi-javascriptcore-0.2.12.14,
gi-javascriptcore-0.2.10.13, gi-javascriptcore-0.2.10.12,
gi-javascriptcore-0.2.10.10, gi-javascriptcore-0.2.8.12,
gi-javascriptcore-0.2.8.11, gi-javascriptcore-0.2.4.15,
gi-javascriptcore-0.2.4.14, gi-javascriptcore-0.2.4.13,
gi-javascriptcore-0.2.4.12, gi-javascriptcore-0.2.4.11,
gi-javascriptcore-0.2.4.10, gi-javascriptcore-0.2.4.9,
gi-javascriptcore-0.2.4.8 (constraint from user target requires ==4.0.15)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-javascriptcore