Resolving dependencies... cabal: Could not resolve dependencies: trying: LambdaHack-0.7.0.0:-jsaddle trying: LambdaHack-0.7.0.0:-vty trying: LambdaHack-0.7.0.0:-curses trying: LambdaHack-0.7.0.0:-gtk next goal: sdl2-ttf (dependency of LambdaHack-0.7.0.0:-gtk) rejecting: sdl2-ttf-2.0.2, sdl2-ttf-2.0.1, sdl2-ttf-2.0.0 (conflict: requires pkg-config package sdl2>=2.0.3, not found in the pkg-config database) rejecting: sdl2-ttf-1.0.0, sdl2-ttf-0.2.2, sdl2-ttf-0.2.1, sdl2-ttf-0.2.0 (conflict: LambdaHack-0.7.0.0:gtk => sdl2-ttf>=2) Dependency tree exhaustively searched.