Is there any way to force anaconda to disable accept-range during installation from kickstart?

Issue

• Using a kickstart file to install Red Hat Enterprise Linux server.
• Have a proxy server that is kind off pass-through between the installation and the repositories.
• The problem seems to be that when the packages for installation through kickstart need to be fetched, anaconda is only requesting a specific range (bytes) from the package.
• The proxy doesn't support it and also, accept-range is not an rfc obligatory option.
• So tried to return accept-range: none but it seems anaconda won't accept it.
• Is there a way during the install to disable the accept-range requisition when anaconda downloads files from the repositories via the proxy?