Comment 23 for bug 183368

I ran into the same issue when I started... malept had the answer of course.

When a python applet is modified for the new build system it requires an entry added into configure.ac

Basically in the case above you need to add the following to AC_OUTPUT

src/file-browser-launcher/file-browser-launcher.desktop.in

Other than that the other thing that jumps out at me is that if something is assigned to APPLET_MAIN_FILE it needs to be removed from dist_applet_DATA