diff -Nru squid-deb-proxy-0.8.14/apt-avahi-discover squid-deb-proxy-0.8.14ubuntu1/apt-avahi-discover
--- squid-deb-proxy-0.8.14/apt-avahi-discover	2013-09-20 09:56:24.000000000 +0200
+++ squid-deb-proxy-0.8.14ubuntu1/apt-avahi-discover	2021-01-08 17:40:30.000000000 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python2
 #
 # use avahi to find a _apt_proxy._tcp provider and return
 # a http proxy string suitable for apt
diff -Nru squid-deb-proxy-0.8.14/debian/changelog squid-deb-proxy-0.8.14ubuntu1/debian/changelog
--- squid-deb-proxy-0.8.14/debian/changelog	2016-01-29 17:56:19.000000000 +0100
+++ squid-deb-proxy-0.8.14ubuntu1/debian/changelog	2021-01-08 17:40:30.000000000 +0100
@@ -1,3 +1,9 @@
+squid-deb-proxy (0.8.14ubuntu1) bionic; urgency=medium
+
+  * mark apt-avahi-discover as being python2 only
+
+ -- Rolf Leggewie <foss@rolf.leggewie.biz>  Sat, 09 Jan 2021 00:40:30 +0800
+
 squid-deb-proxy (0.8.14) unstable; urgency=medium
 
   * depend on squid3 instead of squid, thanks to