_expand completer with ignored-patterns and all-expansions

I'm in an directory with java sources, and I want to cvs update
**/build.xml.

cvs update **/build.xml<tab> 

I have it so that my completers are _expand then _complete, and first
choice it offers is a list of all the files, which is what I want, so
my choices are:

   1. bin/a/b/c/build.xml bin/d/e/f/build.xml a/b/c/build.xml d/e/f/build.xml
   2. bin/a/b/c/build.xml
   3. bin/d/e/f/build.xml
   4. a/b/c/build.xml
   5. d/e/f/build.xml
   6. foo/bar/build.xml

Pressing Enter on choice 1. leads to a quick realization that bin/
directory is not under version control, so whole cvs command fails
with unable to find CVS/Entries.

After doing:

zstyle ':completion:*expand*:*' ignored-patterns 'bin/*'

The choices offered are:

   1. a/b/c/build.xml
   2. d/e/f/build.xml
   3. foo/bar/build.xml