building kio on Mac

[Allen Winter]

% kdesrc-build kio
Could not locate file "kf5/kdoctools/customization" in 
("/Users/allenwinter/Library/Application Support", "/Library/Application 
Support")
Could not locate file "kf5/kdoctools/customization" in 
("/Users/allenwinter/Library/Application Support", "/Library/Application 
Support")
Error: Could not find kdoctools catalogs

kdesrc-build kdoctools succeeded though.
I recall this was a QStandardPaths thing. but I forgot the trick to solving.

help.