Resolving dependencies... cabal: Could not resolve dependencies: next goal: GLFW-b-demo (user goal) rejecting: GLFW-b-demo-1.0.6, 1.0.5, 1.0.4, 1.0.3, 1.0.2 (global constraint requires ==1.0.1) trying: GLFW-b-demo-1.0.1 next goal: OpenGL (dependency of GLFW-b-demo-1.0.1) rejecting: OpenGL-2.12.0.1, 2.12.0.0, 2.11.1.0, 2.11.0.0, 2.10.0.2, 2.10.0.1, 2.10.0.0, 2.9.2.0, 2.9.1.0, 2.9.0.0 (conflict: GLFW-b-demo => OpenGL==2.8.*) trying: OpenGL-2.8.0.0 trying: GLURaw-1.5.0.1 (dependency of OpenGL-2.8.0.0) next goal: OpenGLRaw (dependency of OpenGL-2.8.0.0) rejecting: OpenGLRaw-2.5.0.0, 2.4.1.0, 2.4.0.0, 2.3.0.0, 2.2.0.0, 2.1.0.0, 2.0.0.0, 1.5.0.1, 1.5.0.0 (conflict: OpenGL => OpenGLRaw>=1.3.0.0 && <1.5.0.0) rejecting: OpenGLRaw-1.4.0.0, 1.3.0.0 (conflict: GLURaw => OpenGLRaw>=2.4 && <2.6) rejecting: OpenGLRaw-1.2.0.0, 1.1.0.2, 1.1.0.1, 1.1.0.0, 1.0.1.0, 1.0.0.0 (conflict: OpenGL => OpenGLRaw>=1.3.0.0 && <1.5.0.0) Dependency tree exhaustively searched.