force usage of local lib directory

t/account-manager.t

@@ -34,7 +34,7 @@ sub run_executable {
 
     my @args = $args ? split(/\s+/, $args) : ();
     run(
-        [ $EXECUTABLE_NAME, 'bin/' . $executable, @args ],
+        [ $EXECUTABLE_NAME, '-I', 'lib', 'bin/' . $executable, @args ],
         \my ($in, $out, $err)
     );
     return ($out, $err, $CHILD_ERROR >> 8);