Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: sdl2-ttf (user goal)
rejecting: sdl2-ttf-2.0.1 (conflict: requires pkg-config package sdl2>=2.0.3,
not found in the pkg-config database)
rejecting: sdl2-ttf-2.0.0, sdl2-ttf-1.0.0, sdl2-ttf-0.2.2, sdl2-ttf-0.2.1,
sdl2-ttf-0.2.0 (constraint from user target requires ==2.0.1)
Dependency tree exhaustively searched.