diff -up Mail-Mbox-MessageParser-1.5105/Makefile.PL.orig Mail-Mbox-MessageParser-1.5105/Makefile.PL
--- Mail-Mbox-MessageParser-1.5105/Makefile.PL.orig 2017-05-17 16:46:27.904071147 +0200
+++ Mail-Mbox-MessageParser-1.5105/Makefile.PL 2017-05-17 16:47:01.568939390 +0200
@@ -2,6 +2,7 @@
use strict;
+BEGIN { push @INC, '.'; }
# For PRIVATE Module::Install extensions
use lib 'private-lib';