Comment 1 for bug 746859

<mgz> I think the daily builds start from a tarball.
 or... what spiv said.
 so, there's another bug about the start point being wrong perhaps, but I don't see why the build doesn't update the pyrex generated files
<spiv> I'm pretty sure this is some sort of hangover from 'debs start with a source tarball and then add packaging goo', although I'm unclear on the precise route between that fact and this problem :)
<spiv> It may be something like the timestamps of the .c files on disk in the checkout/build area aren't older than the .pyx files, so the build stuff thinks they are up to date.