-%{__make} linux # other, arch-dependent targets differ only in optymalization flags
-%{__make} COPTFLAGS="%{rpmcflags}"
+%{__make} INSTALL_DATA_DIR=%{_datadir}/bzflag linux
+# other, arch-dependent targets differ only in optymalization flags
+%{__make} INSTALL_DATA_DIR=%{_datadir}/bzflag COPTFLAGS="%{rpmcflags}"