diff -r 8371c99c7947 -r 240ca282331d dev/provisioning/modules/drush/manifests/init.pp
--- a/dev/provisioning/modules/drush/manifests/init.pp	Thu Nov 10 02:01:46 2016 +0100
+++ b/dev/provisioning/modules/drush/manifests/init.pp	Thu Nov 10 14:07:02 2016 +0100
@@ -80,6 +80,11 @@
 
   $install_base_path = '/opt/drush'
   $drush_exe_default = '/usr/local/bin/drush'
+  if($php_path) {
+      $drush_php = $php_path
+  } else {
+      $drush_php = "/usr/bin/php"
+  }
 
   class{'drush::setup': } ->
   class{'drush::config': } ~>