/usr/share/z88dk/include/oz/ is in z88dk-data 1.8.ds1-10.
This file is owned by root:root, with mode 0o755.
..
/usr/share/z88dk/include/oz/command0.h
/usr/share/z88dk/include/oz/command1.h
/usr/share/z88dk/include/oz/command2.h
/usr/share/z88dk/include/oz/command3.h
/usr/share/z88dk/include/oz/command4.h
/usr/share/z88dk/include/oz/command5.h
/usr/share/z88dk/include/oz/command6.h
/usr/share/z88dk/include/oz/command7.h
/usr/share/z88dk/include/oz/help0.h
/usr/share/z88dk/include/oz/help1.h
/usr/share/z88dk/include/oz/help2.h
/usr/share/z88dk/include/oz/help3.h
/usr/share/z88dk/include/oz/help4.h
/usr/share/z88dk/include/oz/help5.h
/usr/share/z88dk/include/oz/help6.h
/usr/share/z88dk/include/oz/help7.h
/usr/share/z88dk/include/oz700/ozfont.h
/usr/share/z88dk/include/oz700/ozgfx.h
/usr/share/z88dk/include/oz700/ozinput.h
/usr/share/z88dk/include/oz700/ozint.h
/usr/share/z88dk/include/oz700/ozmisc.h
/usr/share/z88dk/include/oz700/ozscreen.h
/usr/share/z88dk/include/oz700/ozserial.h
/usr/share/z88dk/include/oz700/oztime.h
/usr/share/z88dk/include/oz700/scaldate.h