-install usr/bin/* $RPM_BUILD_ROOT%{_bindir}
-install usr/include/Cg/* $RPM_BUILD_ROOT%{_includedir}/Cg
-install usr/%{_lib}/* $RPM_BUILD_ROOT%{_libdir}
-install usr/share/man/man3/* $RPM_BUILD_ROOT%{_mandir}/man3
-
-cp -r usr/local/Cg/examples/* $RPM_BUILD_ROOT%{_examplesdir}/%{name}-%{version}
+install -p usr/bin/* $RPM_BUILD_ROOT%{_bindir}
+cp -p usr/include/Cg/* $RPM_BUILD_ROOT%{_includedir}/Cg
+cp -p usr/%{_lib}/* $RPM_BUILD_ROOT%{_libdir}
+cp -p usr/share/man/man3/* $RPM_BUILD_ROOT%{_mandir}/man3
+cp -a usr/local/Cg/examples/* $RPM_BUILD_ROOT%{_examplesdir}/%{name}-%{version}