Oops, the diff in my message was inverted. Here is the correct one:
diff --git a/data/dconf/defaults/00-upstream-settings b/data/dconf/defaults/00-upstream-settings index 603903e6..0f418995 100644 --- a/data/dconf/defaults/00-upstream-settings +++ b/data/dconf/defaults/00-upstream-settings @@ -9,6 +9,9 @@ [org/gnome/desktop/session] session-name='gnome-login'+[org/gnome/desktop/input-sources]
+show-all-sources=true + [org/gnome/desktop/a11y] always-show-universal-access-status=true
