--- build/unix/mozilla.in.orig	2018-09-19 14:46:49.800000000 +0200
+++ build/unix/mozilla.in	2018-09-19 14:47:17.100000000 +0200
@@ -25,7 +25,7 @@
 found=0
 progname="$0"
 curdir=`dirname "$progname"`
-progbase=`basename "$progname"`
+progbase=thunderbird
 run_moz="$curdir/run-mozilla.sh"
 if test -x "$run_moz"; then
   dist_bin="$curdir"