Switch to HTTP.

builder/stage0/00-configure-apt/files/raspi.list

@@ -1,3 +1,3 @@
-deb ftp://archive.raspberrypi.org/debian/ buster main
+deb http://archive.raspberrypi.org/debian/ buster main
 # Uncomment line below then 'apt-get update' to enable 'apt-get source'
 #deb-src http://archive.raspberrypi.org/debian/ buster main

builder/stage0/00-configure-apt/files/sources.list

@@ -1,3 +1,3 @@
-deb ftp://mirrors.ocf.berkeley.edu/raspbian/raspbian buster main contrib non-free rpi
+deb http://mirrors.ocf.berkeley.edu/raspbian/raspbian buster main contrib non-free rpi
 # Uncomment line below then 'apt-get update' to enable 'apt-get source'
 #deb-src http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi