Why is variable out of scope?

[George Russell]

(cc:d to Simon Marlow since my last bug report doesn't seem to have got through)

When I attempt to compile the attached file with (a) with ghc-4.08/Solaris and 
(b) ghc-4.08.1/Linux I get the following message:

TestSh.hs:8:
    `Shape' is not in scope
    When checking kinds in `HasConfigValue Shape nodeTypeParms'
    In the class declaration for `HasShape'

Compilation had errors

(command line :
ghc TestSh.hs -c -syslib lang -fglasgow-exts
)

So how on earth is Shape not in scope, when I defined it two lines previously?
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