make[1]: Leaving directory ‘/«PKGBUILDDIR»/obj-x86_64-linux-gnu’
dh_install -O–parallel -O–buildsystem=cmake
dh_install: photoflow missing files: usr/lib
dh_install: missing files, aborting
debian/rules:34: recipe for target ‘binary’ failed
I’m working on it.
Update: It seems to work. This patch did the trick: http://pastebin.com/TwvZQPGE
Imho you should integrate it in your code.
PS: There is a built-in Gimp-2.9 plugin called file-darktable which tries to start darktable for raw image file handling. PhotoFlow will ignored. 