> The vapigen program needs to be installed on the build machine. The VAPI > should then be generated. > There is a check in configure.ac for > vapigen:https://git.gnome.org/browse/gegl/tree/configure.ac#n478 >vapigen is part of the valac package, >e.g.https://packages.debian.org/stretch/i386/valac/filelist
gegl already Build-Depends on valac. Thanks, Jeremy Bicha
