Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: sdl2-gfx (user goal)
[__0] rejecting: sdl2-gfx-0.3.0.0 (conflict: pkg-config package
SDL2_gfx==1.0.1 || >1.0.1, not found in the pkg-config database)
[__0] rejecting: sdl2-gfx-0.2 (constraint from user target requires ==0.3.0.0)
[__0] fail (backjumping, conflict set: sdl2-gfx)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: sdl2-gfx