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ivan-m / graphviz

Haskell bindings to the Graphviz toolkit
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Configuration error whilst installing via cabal #32

Closed leaffan closed 6 years ago

leaffan commented 6 years ago

Trying to install graphviz via cabal (using cabal install graphviz), I'm encountering multiple errors in the following form:

[ 7 of 31] Compiling Data.GraphViz.Printing ( Data\GraphViz\Printing.hs, dist\build\Data\GraphViz\Printing.o )

Data\GraphViz\Printing.hs:232:16: error:
    Ambiguous occurrence `<>'
    It could refer to either `Prelude.<>',
                             imported from `Prelude' at Data\GraphViz\Printing.hs:48:8-29
                             (and originally defined in `GHC.Base')
                          or `PP.<>',
                             imported from `Text.PrettyPrint.Leijen.Text.Monadic' at Data\GraphViz\Printing.hs:(75,1)-(81,68)
    |
232 | wrap b a d = b <> d <> a
    |                ^^

Is this an issue that can be solved by adjusting my environment?

ivan-m commented 6 years ago

Duplicate of #30

Unfortunately I don't have a working release compatible with 8.4 yet; life keeps getting in the way.

I may be able to work on it during LambaJAM next week.