The standard XftConfig file aliases the serif/sans/mono aliases to the old names
for the Luxi fonts.
eg. it is now saying
match any family == "sans" edit family += "LuciduxSans";
but should be saying
match any family == "sans" edit family += "Luxi Sans";
Luxi font aliases added to XftConfig in 4.2.0-6.34 in rawhide. Please
update the report to let me know it works so I can close it as RAWHIDE.