missing mtl (which exists) when installing filemanip package

Albert Y. C. Lai trebla at vex.net
Thu Jan 10 20:43:29 CET 2013

On 13-01-10 10:34 AM, HP Wei wrote:
> Question:
>     why can't $HOME/ghc/lib/mtl-
>     be recognized during the above Setup configure ??

You need to see my

Existence of files is insufficient. Metadata trumps data.

But there is one point I don't understand in Brent Yorgey's theory.

Presumably, you are consistent, you also used Setup rather than "cabal 
install" for mtl. Therefore, mtl should also be in global.

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