diff -up gimp-2.10.18/etc/gimprc.in.no-phone-home-default gimp-2.10.18/etc/gimprc.in
--- gimp-2.10.18/etc/gimprc.in.no-phone-home-default 2020-02-23 21:15:47.217777581 +0100
+++ gimp-2.10.18/etc/gimprc.in 2020-02-23 21:22:42.416162110 +0100
@@ -393,7 +393,7 @@
# Check for availability of GIMP updates through background internet queries.
# Possible values are yes and no.
#
-# (check-updates yes)
+(check-updates no)
# Timestamp of the last update check. (null)
#