Illegal datatype context #26

dagit opened this Issue Mar 24, 2012 · 1 comment


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Haskell OpenGL member

I'm trying to install OpenGL library. (ghc 7.4.1, Ubuntu Lucid)

But installation fails with

[54 of 82] Compiling Graphics.Rendering.OpenGL.GL.Evaluators ( Graphics/Rendering/OpenGL/GL/Evaluators.hs, dist/build/Graphics/Rendering/OpenGL/GL/Evaluators.o )

Illegal datatype context (use -XDatatypeContexts): (ControlPoint c,
Domain d) =>
cabal: Error: some packages failed to install:
OpenGL- failed during the building phase. The exception was:
ExitFailure 1


Please mark as fixed, seems to fix this issue for me.

@dagit dagit closed this Oct 14, 2012
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