For those of you wanting to try this out on stretch, I built the package with this patch. Download from:
https://people.debian.org/~jgoerzen/kipi-plugins-common_5.3.0-1_all.deb and https://people.debian.org/~jgoerzen/kipi-plugins_5.3.0-1_amd64.deb And verify sha256sums: c80faa0f239e98535d603223c0566f2a522ff4aa68d027aba38de201bc8b2613 kipi-plugins_5.3.0-1_amd64.deb f2ae2a52a708c87d84105743f55a9b42038221a9edf6a7b1996e49245234a1a9 kipi-plugins-common_5.3.0-1_all.deb John