diff --git a/artefact.inc.php b/artefact.inc.php
index ce6a700..6571089 100644
--- a/artefact.inc.php
+++ b/artefact.inc.php
@@ -43,6 +43,7 @@ class TaskmanArtefact
     if(isset($this->sources_fn[$idx]))
     {
       $fn = $this->sources_fn[$idx];
+      \taskman\log(2, "Task '{$this->task->getName()}' artefact '{$this->path}' resolving sources at $idx\n");
       $sources = $fn();
       $this->sources[$idx] = $sources;
       return $sources;
@@ -69,6 +70,7 @@ class TaskmanArtefact
     if(isset($this->sources_changed_fn[$idx]))
     {
       $fn = $this->sources_changed_fn[$idx];
+      \taskman\log(2, "Task '{$this->task->getName()}' artefact '{$this->path}' resolving changed sources at $idx\n");
       $changed = $fn();
       $this->sources_changed[$idx] = $changed;
       return $changed;
diff --git a/internal.inc.php b/internal.inc.php
index 8d8cf4d..c651dc5 100644
--- a/internal.inc.php
+++ b/internal.inc.php
@@ -202,6 +202,14 @@ function _process_argv(array &$argv)
     {
       $TASKMAN_LOG_LEVEL = -1;
     }
+    else if($v == '-l')
+    {
+      if(!isset($argv[$i+1]))
+        throw new \taskman\TaskmanException("Log level is missing");
+
+      $TASKMAN_LOG_LEVEL = intval($argv[$i+1]);
+      ++$i;
+    }
     else if($v == '-O')
     {
       $TASKMAN_NO_DEPS = true;