Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: gmndl (user goal)
rejecting: gmndl-0.4.0.2, 0.3 (global constraint requires ==0.2)
trying: gmndl-0.2
next goal: OpenGL (dependency of gmndl-0.2)
rejecting: OpenGL-2.13.1.0, 2.13.0.0, 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, 2.8.0.0, 2.6.0.1,
2.6.0.0, 2.5.0.0 (conflict: gmndl => OpenGL>=2.4 && <2.5)
trying: OpenGL-2.4.0.2
trying: OpenGLRaw-2.6.0.0 (dependency of OpenGL-2.4.0.2)
next goal: bytestring (dependency of OpenGLRaw-2.6.0.0)
rejecting: bytestring-0.10.6.0/installed-236... (conflict: deepseq==1.4.1.2,
bytestring => deepseq==1.4.1.1/installed-8fb...)
trying: bytestring-0.10.6.0
trying: gtkglext-0.12.5.0 (dependency of gmndl-0.2)
next goal: pango (dependency of gtkglext-0.12.5.0)
rejecting: pango-0.13.1.0, 0.13.0.5, 0.13.0.4, 0.13.0.3, 0.13.0.2, 0.13.0.1,
0.13.0.0 (conflict: gtkglext => pango>=0.12.5.0 && <0.13)
trying: pango-0.12.5.3
trying: directory-1.2.2.0/installed-258... (dependency of pango-0.12.5.3)
next goal: unix (dependency of directory-1.2.2.0/installed-258...)
rejecting: unix-2.7.1.0/installed-643... (conflict: bytestring==0.10.6.0, unix
=> bytestring==0.10.6.0/installed-236...)
rejecting: unix-2.7.1.0, 2.7.0.1, 2.7.0.0, 2.6.0.1, 2.6.0.0, 2.5.1.1, 2.5.1.0,
2.5.0.0, 2.4.2.0, 2.4.1.0, 2.4.0.2, 2.4.0.1, 2.4.0.0, 2.3.2.0, 2.3.1.0,
2.3.0.0, 2.2.0.0, 2.0 (conflict: directory => unix==2.7.1.0/installed-643...)
Dependency tree exhaustively searched.