-ifeq ($(OS_VERSION_ID),16.04)
- DEB_DEPENDS += python-dev
- DEB_DEPENDS += libssl-dev
-else ifeq ($(OS_VERSION_ID),18.04)
- DEB_DEPENDS += python-dev
+LIBFFI=libffi6 # works on all but 20.04
+
+ifeq ($(OS_VERSION_ID),18.04)
+ DEB_DEPENDS += python-dev python-all python-pip python-virtualenv