Comment 8 for bug 1337253

Many thanks Jamie! I implemented this now in http://anonscm.debian.org/gitweb/?p=autopkgtest/autopkgtest.git;a=commitdiff;h=b33d5a6e . While that workaround is now 3.84 times more ugly than before ☺ it reduces the time for doing this from ~ 1 minute to ~ 1 second, which is great.