-sed -i -e 's#\$TCL_PACKAGE_PATH#%{_prefix}/lib#g' configure.ac
-sed -i -e 's#/lib/lua/#/%{_lib}/lua/#g' configure.ac
+%{__sed} -i -e 's#\$TCL_PACKAGE_PATH#%{_prefix}/lib#g' configure.ac
+%{__sed} -i -e 's#/lib/lua/#/%{_lib}/lua/#g' configure.ac
+
+%{__sed} -E -i -e '1s,#!\s*/usr/bin/python(\s|$),#!%{__python}\1,' \
+ examples/stripes.py
+
+%{__sed} -E -i -e '1s,#!\s*/usr/bin/env\s+tclsh@TCL_VERSION@(\s|$),#!%{__tclsh}\1,' \
+ bindings/tcl/ifOctets.tcl.in