allow overriding shared path

--HG--
extra : transplant_source : %EE%2A%90%BD%E6f%EDM9%DD%A2%BB%00%93%8B%CA%AF-%80%88
use absolute imports

--HG--
extra : transplant_source : %F2h%86%7EI%3A%1A2%17%26%D9%07P%03%17%E2%ED%E8%8C%0F