What is correct way to add new binary to be available in %pre section of kickstart

I want to make the common cli tool bc available in the %pre section of the kickstart. This tool has no dependencies beyond glib so will link/work nicely right out of the box if there was jsut a way of:

  • open up isolinux/vmlinuz
  • drop bc into /usr/bin
  • seal up isolinux/vmlinuz

I can’t seem to find the correct way to approach this? I suppose the alternative way is to just open up the bc*.rpm from inside the pre section since i have access to the to-be-installed rpms and cpio? I could just extrapolate the file?

I was just hoping for a slick way to just have the tool present all the time.