diff -up munin-2.0.33/master/Build.PL.orig munin-2.0.33/master/Build.PL
--- munin-2.0.33/master/Build.PL.orig	2017-05-25 12:15:34.037053427 +0200
+++ munin-2.0.33/master/Build.PL	2017-05-25 12:15:53.935936213 +0200
@@ -1,3 +1,4 @@
+BEGIN { push @INC, '.'; }
 use MasterBuilder;
 
 use warnings;
diff -up munin-2.0.33/node/Build.PL.orig munin-2.0.33/node/Build.PL
--- munin-2.0.33/node/Build.PL.orig	2017-05-25 12:16:06.121864433 +0200
+++ munin-2.0.33/node/Build.PL	2017-05-25 12:16:17.849795350 +0200
@@ -1,3 +1,4 @@
+BEGIN { push @INC, '.'; }
 use NodeBuilder;
 
 use warnings;
diff -up munin-2.0.33/plugins/Build.PL.orig munin-2.0.33/plugins/Build.PL
--- munin-2.0.33/plugins/Build.PL.orig	2017-05-25 12:16:30.426721266 +0200
+++ munin-2.0.33/plugins/Build.PL	2017-05-25 12:16:40.500661926 +0200
@@ -1,3 +1,4 @@
+BEGIN { push @INC, '.'; }
 use PluginsBuilder;
 
 use warnings;