<cjwatson@precise-lpdev ~/src/canonical/launchpad/lp-branches/virtualenv-pip>$ cat bootstrap-versions.txt 
pip==7.1.0
wheel==0.24.0

# Put requirements here that are needed by setup_requires.  We cannot yet rely
# on constraints files here, since the version of pip installed by Ubuntu
# 12.04's virtualenv doesn't support it.
d2to1==0.2.10
pbr==0.5.20