diff -urN archiso-43-a/archiso/initcpio/hooks/archiso_pxe_common archiso-43-b/archiso/initcpio/hooks/archiso_pxe_common
--- archiso-43-a/archiso/initcpio/hooks/archiso_pxe_common	2019-10-16 12:10:09.000000000 +0100
+++ archiso-43-b/archiso/initcpio/hooks/archiso_pxe_common	2020-05-24 16:53:12.941000000 +0100
@@ -61,10 +61,11 @@
         [[ -z "${copy_resolvconf}" ]] && copy_resolvconf="y"
 
         if [[ "${copytoram}" == "y" ]]; then
-            if [[ -n "${bootif_dev}" ]]; then
-                ip addr flush dev "${bootif_dev}"
-                ip link set "${bootif_dev}" down
-            fi
+            for curif in /sys/class/net/*; do
+                netdev=${curif#/sys/class/net/}
+                ip addr flush dev "${netdev}"
+                ip link set "${netdev}" down
+            done
         elif [[ "${copy_resolvconf}" != "n" && -f /etc/resolv.conf ]]; then
             cp /etc/resolv.conf /new_root/etc/resolv.conf
         fi