your package build-depends on deprecated Frameworks -dev packages,
which currently are transitional packages.
In particular, the replacements needed for this packages are:
- kdoctools-dev -> libkf5doctools-dev
Attached there is a patch for this.
The non-deprecated packages are already available in the current Debian
stable, i.e. Stretch.
@@ -8,7 +8,7 @@ Build-Depends: cmake,
debhelper (>= 11.0.0),
r-base-dev (>= 3.0.0)