SUMMARY

STEPS TO REPRODUCE
1.  install craft following the howto at https://community.kde.org/Guidelines_and_HOWTOs/Build_from_source/Windows#Installing_Craft
2. open dbus.py (see https://invent.kde.org/packaging/craft-blueprints-kde/-/blob/master/libs/dbus/dbus.py#L97) in editor 

in 
     
 def setTargets(self):

comment out 
        #self.targetConfigurePath["master"] = "cmake"

and set 
        self.defaultTarget = "master"

in 
def setDependencies(self):

add 
        self.runtimeDependencies["data/docbook-dtd"] = None
        self.runtimeDependencies["data/docbook-xsl"] = None

in
      class PackageCMake(CMakePackageBase):
           def __init__(self, **args):
            ...
set
           -DDBUS_ENABLE_XML_DOCS=ON 


3. run  craft dbus

OBSERVED RESULT
The build fails with 

-- Could NOT find DocBookXSL (missing: DocBookXSL_DIR)
CMake Error at doc/CMakeLists.txt:141 (add_dependencies):
  Cannot add target-level dependencies to non-existent target "xmldoc".
...


EXPECTED RESULT
The build show not fail

SOFTWARE/OS VERSIONS
Windows: 10