ianb

V=2.7
rm -rf build-env
rm -rf vendor/setuptools-*.egg vendor/pip-*.egg
virtualenv --python python$V --no-site-packages build-env
mv build-env/lib/python$V/site-packages/ build-env/lib/python$V/orig-site-packages
(cd build-env/lib/python$V && 
 ln -s  ../../../vendor site-packages && 
 cd ../.. && mv bin bin-orig && 
 ln -s ../vendor/bin bin && 
 mv bin-orig/python* bin/ )