Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: gi-webkit2 (user goal)
[__0] rejecting: gi-webkit2-4.0.28 (conflict: pkg-config package
webkit2gtk-4.0-any, not found in the pkg-config database)
[__0] rejecting: gi-webkit2-4.0.27, gi-webkit2-4.0.26, gi-webkit2-4.0.25,
gi-webkit2-4.0.24, gi-webkit2-4.0.23, gi-webkit2-4.0.22, gi-webkit2-4.0.21,
gi-webkit2-4.0.19, gi-webkit2-4.0.18, gi-webkit2-4.0.17, gi-webkit2-4.0.15,
gi-webkit2-4.0.14, gi-webkit2-4.0.13, gi-webkit2-4.0.12, gi-webkit2-4.0.11,
gi-webkit2-4.0.10, gi-webkit2-4.0.9, gi-webkit2-4.0.8, gi-webkit2-4.0.7,
gi-webkit2-4.0.6, gi-webkit2-4.0.5, gi-webkit2-4.0.4, gi-webkit2-4.0.3,
gi-webkit2-4.0.2, gi-webkit2-4.0.1, gi-webkit2-0.2.12.15,
gi-webkit2-0.2.12.14, gi-webkit2-0.2.10.13, gi-webkit2-0.2.10.12,
gi-webkit2-0.2.10.10, gi-webkit2-0.2.8.12, gi-webkit2-0.2.8.11,
gi-webkit2-4.0.16 (constraint from user target requires ==4.0.28)
[__0] fail (backjumping, conflict set: gi-webkit2)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: gi-webkit2