[Haskell] Re: haddock not finding base lib docs -- $topdir ?

Simon Marlow simonmarhaskell at gmail.com
Tue Dec 5 05:01:35 EST 2006

Simon Marlow wrote:
> Conal Elliott wrote:
>> I'm running haddock for the first time, via cabal.  I get the 
>> following message when i do "runhaskell Setup.hs haddock" on monadLib:
>>  Warning: cannot use package base-2.0:
>>     HTML directory $topdir\html\libraries\base does not exist.
>> I do have c:/ghc/ghc-6.6/doc/html/libraries/base/.  Is there some way 
>> i can let cabal know how to find it?  What is $topdir about?
> This is due to the way GHC is installed on Windows, the package database 
> doesn't have hardcoded pathnames, the idea being that you can move your 
> GHC anywhere in the filesystem and it will still work.
> Unfortunately this means that Haddock can't find the documentation for 
> the packages.
> One workaround is to specify the paths by hand, using Haddock's 
> --read-interface flag.  You're using Haddock via Cabal though, so that 
> doesn't work too well. The other workaround is to find GHC's 
> package.conf file and replace the string $topdir with the literal path 
> ("c:/ghc/ghc-6.6" in your case - perhaps you have to append "/doc" for 
> the haddock fields, though).
> I'll file a bug report against Cabal, we should really make this work.

I just noticed we have a bug open for this in GHC's bug tracker:


So it should get fixed for 6.6.1.


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