gistfile1.txt

[arian@t490s:~/Projects/nixos/nixpkgs]$ git diff nixos/modules/system/boot/initrd-network.nix
diff --git a/nixos/modules/system/boot/initrd-network.nix b/nixos/modules/system/boot/initrd-network.nix
index cb8fc957a99..d7de85b00df 100644
--- a/nixos/modules/system/boot/initrd-network.nix
+++ b/nixos/modules/system/boot/initrd-network.nix
@@ -130,6 +130,15 @@ in
         if [ -n "$hasNetwork" ]; then
           echo "networking is up!"
           ${cfg.postCommands}
+          # And bring all interfaces down Reason is that we don't do interface
+          # renaming in stage-1 (yet), But having the un-renamed interfaces "in
+          # use" when switching to stage-2 causes the rename to fail
+          for iface in $(ls /sys/class/net/); do
+            echo "bringing up network interface $iface..."
+            ip link set "$iface" down
+          done
+
+
         fi
       '');