Disable ipv6 during installation

Hello, I'm setting up an FAI server behind a network I don't control, and no IPv6 is available on this network. How can I disable IPv6 during the installation process using FAI ? I've tried changing the sysctl configuration of the nfsroot by adding the following lines to /srv/fai/nfsroot/etc/sys

Re: Disable ipv6 during installation

Add to the pxe-boot-entry for the kernel append-line "ipv6.disable=1" label fai-generated kernel vmlinuz-4.9.0-2-amd64 append initrd=initrd.img-4.9.0-2-amd64 ip=dhcp root=nfs:SERVERIP:/srv/fai/nfsroot:vers=3 rootovl FAI_FLAGS=verbose,sshd,createvt FAI_CONFIG_SRC=nfs://SERVERIP/srv/fai/config FAI_