After taking some advice I got on
#epiphany I’ve finally managed to get both
epiphany-extensions out of CVS to compile. In this case
jhbuild buildone was my friend. I installed
python-gnome2-desktop-dev and set to work.
jhbuild to build
PKG_CONFIG_PATH in between). Then I tackled
epiphany from CVS. It gave me no grief at all, though I did forget to enable Python support at first.
epiphany-extensions was equally simple.
Finally I can get serious about getting
epilicious into GNOME