sdist puts Happy-generated .hs files in the wrong place

[bos]

(Imported from Trac #166, reported by guest on 2007-10-23)

I want to use sdist to generate source distributions of Happy that don't depend on Happy, and hence come with the Happy-generated .hs files for the parsers. When I try this, the source files are included, but in the root of the tree, whereas Cabal seems to look for them in dist/build. I can move them by hand and re-generate the tarball, and that works.

I'm fairly sure this worked with older versions of Cabal.

[bos]

(Imported comment by @dcoutts on 2007-10-23)

Sun Mar 23 14:54:52 GMT 2008  Andrea Vezzosi <sanzhiyan@gmail.com>
- FIX #166 by setting the right buildDir when preprocessing in sdist
  

This fixes the immediate problem. The rest of the problem is that tarballs that have pre-generated files in dist/ will get cleaned. They should really go in another dir that is checked but not cleaned. I'll open a separate bug on that issue.