I am installing darcs 1.0.6 on Mac OS X, and I have to make the following
changes to the contents of the package so that it will fit nicely into my unixy
filesystem structure:

mkdir bin man share share/doc share/doc/darcs
mv darcs bin
mv darcs.1 man
mv * share/doc/darcs

Then I can install it in my filesystem, either with "cp -a darcs-1.0.6/*
/usr/local" or by using GNU stow, which accomplishes the same thing using
symlinks instead of copies, thus making it uninstallable and versionable.

So my wish is that the darcs binary for Mac OS X was already laid out in this
structure.

In principle, we don't provide binaries, so this would be a question for the
various volunteers that package builds.  Looking over the description on
  http://wiki.darcs.net/index.html/CategoryBinaries 
the binaries that people provide seem to meet this request already.

That said, it might be nice if the Makefile had a target that made it super-easy
for people to make their own binaries for distribution (bindist?)