-install -d %{RPM_BUILD_ROOT}%{_bindir}/
-install bing %{RPM_BUILD_ROOT}%{_bindir}/bing
-gzip -9nf README bing.ps ChangeLog
-install bing.8 %{_mandir}/man8
+install -d $RPM_BUILD_ROOT{%{_bindir},%{_mandir}/man8}
+
+install bing $RPM_BUILD_ROOT%{_bindir}
+install bing.8 $RPM_BUILD_ROOT%{_mandir}/man8
+
+gzip -9nf README ChangeLog
+
+%clean
+rm -rf $RPM_BUILD_ROOT