--- xhprof_lib/utils/callgraph_utils.php.orig	2013-09-30 17:46:07.000000000 -0500
+++ xhprof_lib/utils/callgraph_utils.php	2023-11-16 06:19:42.000000000 -0600
@@ -107,7 +107,7 @@
        2 => array("pipe", "w")
        );
 
-  $cmd = " dot -T".$type;
+  $cmd = " /opt/local/bin/dot -T".$type;
 
   $process = proc_open($cmd, $descriptorspec, $pipes, "/tmp", array());
   if (is_resource($process)) {