diff --git a/slave_scripts/build-venv.sh b/slave_scripts/build-venv.sh
index d8344510..85bf7e47 100755
--- a/slave_scripts/build-venv.sh
+++ b/slave_scripts/build-venv.sh
@@ -16,7 +16,8 @@ do
   mkdir -p jenkins_venvs/$branch
   python tools/install_venv.py
   virtualenv --relocatable .venv
-  tar cvfz jenkins_venvs/$branch/venv.tgz .venv
-  rm -fr .venv
+  pip bundle .cache.bundle -r tools/pip-requires
+  tar cvfz jenkins_venvs/$branch/venv.tgz .venv .cache.bundle
+  rm -fr .venv .cache.bundle
 done
 git checkout master
diff --git a/slave_scripts/copy-venv.sh b/slave_scripts/copy-venv.sh
index cfb63b48..69aaa203 100755
--- a/slave_scripts/copy-venv.sh
+++ b/slave_scripts/copy-venv.sh
@@ -8,12 +8,17 @@ mv jenkins_venvs/$GERRIT_BRANCH/venv.tgz .
 rm -fr jenkins_venvs
 tar xfz venv.tgz
 rm venv.tgz
-perl -MCwd -ple '$CWD=Cwd::abs_path();s,^VIRTUAL_ENV=.*,VIRTUAL_ENV="$CWD/.venv",' -i .venv/bin/activate
+if [ -f .cache.bundle ] ; then
+  pip install --upgrade -E .venv file://`pwd`/.cache.bundle
+  rm .cache.bundle
+else
+  perl -MCwd -ple '$CWD=Cwd::abs_path();s,^VIRTUAL_ENV=.*,VIRTUAL_ENV="$CWD/.venv",' -i .venv/bin/activate
 # This gets easy-install.pth as well as $PROJECT.pth.  Examples for glance:
 # easy-install.pth looks like: /home/jenkins/workspace/glance-venv/.venv/src/keystone
 # $PROJECT.pth looks like: /home/jenkins/workspace/glance-venv
-perl -MCwd -ple '$CWD=Cwd::abs_path();s,^/.*/workspace/[^/]+(/.*)$,$CWD$1,' -i .venv/lib/python2.7/site-packages/*.pth
+  perl -MCwd -ple '$CWD=Cwd::abs_path();s,^/.*/workspace/[^/]+(/.*)$,$CWD$1,' -i .venv/lib/python2.7/site-packages/*.pth
 # This is needed for the keystone install for glance
-perl -MCwd -ple '$CWD=Cwd::abs_path();s,^/.*/.venv/src/(.*),$CWD/.venv/src/$1,' -i .venv/lib/python2.7/site-packages/*.egg-link
+  perl -MCwd -ple '$CWD=Cwd::abs_path();s,^/.*/.venv/src/(.*),$CWD/.venv/src/$1,' -i .venv/lib/python2.7/site-packages/*.egg-link
 # This is needed for the keystone install for glance
-perl -MCwd -ple '$CWD=Cwd::abs_path();s,/.*/.venv/src/(.*),$CWD/.venv/src/$1,' -i .venv/bin/*
+  perl -MCwd -ple '$CWD=Cwd::abs_path();s,/.*/.venv/src/(.*),$CWD/.venv/src/$1,' -i .venv/bin/*
+fi