Resolving dependencies... cabal: Could not resolve dependencies: [__0] trying: hs-sdl-term-emulator-0.1.0.4 (user goal) [__1] next goal: sdl2 (dependency of hs-sdl-term-emulator) [__1] rejecting: sdl2-2.5.3.0 (conflict: pkg-config package sdl2==2.0.6 || >2.0.6, not found in the pkg-config database) [__1] rejecting: sdl2-2.5.2.0 (conflict: hs-sdl-term-emulator => sdl2^>=2.5.3.0) [__1] skipping: sdl2-2.5.1.0, sdl2-2.5.0.0, sdl2-2.4.1.0, sdl2-2.4.0.1, sdl2-2.4.0, sdl2-2.3.0, sdl2-2.2.0, sdl2-2.1.3.1, sdl2-2.1.3, sdl2-2.1.2.1, sdl2-2.1.2, sdl2-2.1.1, sdl2-2.1.0, sdl2-2.0.0, sdl2-1.3.1, sdl2-1.3.0, sdl2-1.2.0, sdl2-1.1.3, sdl2-1.1.2, sdl2-1.1.1, sdl2-1.1.0, sdl2-1.0.2, sdl2-1.0.1, sdl2-1.0.0, sdl2-2.3.0.1 (has the same characteristics that caused the previous version to fail: excluded by constraint '^>=2.5.3.0' from 'hs-sdl-term-emulator') [__1] fail (backjumping, conflict set: hs-sdl-term-emulator, sdl2) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: hs-sdl-term-emulator, sdl2