Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: SGdemo (user goal)
rejecting: SGdemo-1.1 (constraint from user target requires ==1.0.1)
trying: SGdemo-1.0.1
trying: base-4.9.0.0/installed-4.9... (dependency of SGdemo-1.0.1)
next goal: GLUT (dependency of SGdemo-1.0.1)
rejecting: GLUT-2.7.0.10, GLUT-2.7.0.9, GLUT-2.7.0.8, GLUT-2.7.0.7,
GLUT-2.7.0.6, GLUT-2.7.0.5, GLUT-2.7.0.4, GLUT-2.7.0.3, GLUT-2.7.0.2,
GLUT-2.7.0.1, GLUT-2.7.0.0, GLUT-2.6.0.1, GLUT-2.6.0.0, GLUT-2.5.1.1,
GLUT-2.5.1.0, GLUT-2.5.0.2, GLUT-2.5.0.1, GLUT-2.5.0.0, GLUT-2.4.0.0,
GLUT-2.3.1.0, GLUT-2.3.0.0, GLUT-2.2.2.1, GLUT-2.2.2.0, GLUT-2.2.1.0,
GLUT-2.2.0.0 (conflict: SGdemo => GLUT<2.2)
trying: GLUT-2.1.2.2
next goal: OpenGL (dependency of SGdemo-1.0.1)
rejecting: OpenGL-3.0.1.0, OpenGL-3.0.0.2, OpenGL-3.0.0.1, OpenGL-3.0.0.0,
OpenGL-2.13.2.1, OpenGL-2.13.2.0, OpenGL-2.13.1.1, OpenGL-2.13.1.0,
OpenGL-2.13.0.0, OpenGL-2.12.0.1, OpenGL-2.12.0.0, OpenGL-2.11.1.0,
OpenGL-2.11.0.0, OpenGL-2.10.0.2, OpenGL-2.10.0.1, OpenGL-2.10.0.0,
OpenGL-2.9.2.0, OpenGL-2.9.1.0, OpenGL-2.9.0.0, OpenGL-2.8.0.0,
OpenGL-2.6.0.1, OpenGL-2.6.0.0, OpenGL-2.5.0.0, OpenGL-2.4.0.2,
OpenGL-2.4.0.1, OpenGL-2.4.0.0, OpenGL-2.3.0.0 (conflict: SGdemo =>
OpenGL<2.3)
rejecting: OpenGL-2.2.3.1 (conflict: base==4.9.0.0/installed-4.9..., OpenGL =>
base<4.6)
rejecting: OpenGL-2.2.3.0, OpenGL-2.2.2.0, OpenGL-2.2.1.1 (conflict:
base==4.9.0.0/installed-4.9..., OpenGL => base<4.5)
rejecting: OpenGL-2.1 (conflict: GLUT => OpenGL>=2.2)
Dependency tree exhaustively searched.