diff --git a/docker/python-builder/scripts/install-from-bindep b/docker/python-builder/scripts/install-from-bindep
index b78343bc6e..742028c88a 100755
--- a/docker/python-builder/scripts/install-from-bindep
+++ b/docker/python-builder/scripts/install-from-bindep
@@ -26,11 +26,17 @@ if [ -f /output/requirements.txt ] ; then
     pip install --cache-dir=/output/wheels -r /output/requirements.txt
 fi
 
+# Add any requested extras to the list of things to install
+EXTRAS=""
+for extra in $* ; do
+    EXTRAS="${EXTRAS} -f /output/$extra/requirements.txt"
+done
+
 # Install the wheels.  Use --force here because sibling wheels might
 # be built with the same version number as the latest release, but we
 # really want the speculatively built wheels installed over any
 # automatic dependencies.
-pip install --force --cache-dir=/output/wheels /output/wheels/*.whl
+pip install --force --cache-dir=/output/wheels /output/wheels/*.whl $EXTRAS
 
 # clean up after ourselves
 apt-get clean