Hello I have 2 sources packages Sa and Sb. Sa generate a library "liba" and an executable "a" (which depend on liba) Sb generate a python binding of liba "liba-python" which indeed depend on "liba" so now the question can I use this python binding in the postinst of "a" to configure it. so can I make "a" depends on "liba-python". especially for an upgrade. or must I ask upstream to build a new upstream paquage S = Sa + Sb thanks Frederic