diff -up Hash-FieldHash-0.15/Build.PL.orig Hash-FieldHash-0.15/Build.PL
--- Hash-FieldHash-0.15/Build.PL.orig	2017-05-18 12:00:21.298339432 +0200
+++ Hash-FieldHash-0.15/Build.PL	2017-05-18 12:02:29.216586570 +0200
@@ -9,6 +9,7 @@ use strict;
 use warnings;
 use utf8;
 
+BEGIN { push @INC, '.'; }
 use builder::MyBuilder;
 use File::Basename;
 use File::Spec;