which script-language for pre-inst.script?

Hello list, I want to partition the disc via sfdisk in a pre-install-script. The docu tells me only not to use shell or perl, but not what I can use. My shell-script did not work (BTW, it's the first time I used sfdisk...), it looks like this: <configure> <scripts> <pre-scripts config:type="list"> <script> <interpreter>shell</interpreter> <filename>pre-inst.sh</filename> <source><![CDATA[ #!/bin/sh sfdisk /dev/sda << EOF ,8069,L ,,E ,48381,L ,48172,L ,4102,S ,2023,L ,2008,L ; EOF ]]> </source> </script> </pre-scripts> </scripts> Any hints? Thank You, Boris