- patched /data/pkgsrc/archivers/xz/Makefile 
  add following 

CFLAGS+=     		-Wno-error   # turns -Werror → -Wno-error (warnings stay but not fatal)
CONFIGURE_ARGS+= 	SKIP_WERROR_CHECK=yes

- After build during install PLIST complains 

cp /data/pkgsrc/archivers/xz/work/.destdir/data/pkg/lib/liblzma.so.13 /data/pkgsrc/archivers/xz/work/.destdir/data/pkg/lib/liblzma.so 

- rerun bmake install