diff --git a/src/applications/harbormaster/controller/HarbormasterPlanRunController.php b/src/applications/harbormaster/controller/HarbormasterPlanRunController.php
--- a/src/applications/harbormaster/controller/HarbormasterPlanRunController.php
+++ b/src/applications/harbormaster/controller/HarbormasterPlanRunController.php
@@ -22,6 +22,15 @@
       return new Aphront404Response();
     }
 
+    $cancel_uri = $this->getApplicationURI("plan/{$plan_id}/");
+
+    if (!$plan->canRunManually()) {
+      return $this->newDialog()
+        ->setTitle(pht('Can Not Run Plan'))
+        ->appendParagraph(pht('This plan can not be run manually.'))
+        ->addCancelButton($cancel_uri);
+    }
+
     $e_name = true;
     $v_name = null;
 
@@ -65,7 +74,6 @@
     }
 
     $title = pht('Run Build Plan Manually');
-    $cancel_uri = $this->getApplicationURI("plan/{$plan_id}/");
     $save_button = pht('Run Plan Manually');
 
     $form = id(new PHUIFormLayoutView())
diff --git a/src/applications/harbormaster/controller/HarbormasterPlanViewController.php b/src/applications/harbormaster/controller/HarbormasterPlanViewController.php
--- a/src/applications/harbormaster/controller/HarbormasterPlanViewController.php
+++ b/src/applications/harbormaster/controller/HarbormasterPlanViewController.php
@@ -289,12 +289,14 @@
           ->setIcon('fa-ban'));
     }
 
+    $can_run = ($has_manage && $plan->canRunManually());
+
     $list->addAction(
       id(new PhabricatorActionView())
         ->setName(pht('Run Plan Manually'))
         ->setHref($this->getApplicationURI("plan/run/{$id}/"))
         ->setWorkflow(true)
-        ->setDisabled(!$has_manage)
+        ->setDisabled(!$can_run)
         ->setIcon('fa-play-circle'));
 
     return $list;
diff --git a/src/applications/harbormaster/management/HarbormasterManagementBuildWorkflow.php b/src/applications/harbormaster/management/HarbormasterManagementBuildWorkflow.php
--- a/src/applications/harbormaster/management/HarbormasterManagementBuildWorkflow.php
+++ b/src/applications/harbormaster/management/HarbormasterManagementBuildWorkflow.php
@@ -64,6 +64,11 @@
         pht('Build plan "%s" does not exist.', $plan_id));
     }
 
+    if (!$plan->canRunManually()) {
+      throw new PhutilArgumentUsageException(
+        pht('This build plan can not be run manually.'));
+    }
+
     $console = PhutilConsole::getConsole();
 
     $buildable = HarbormasterBuildable::initializeNewBuildable($viewer)
diff --git a/src/applications/harbormaster/storage/configuration/HarbormasterBuildPlan.php b/src/applications/harbormaster/storage/configuration/HarbormasterBuildPlan.php
--- a/src/applications/harbormaster/storage/configuration/HarbormasterBuildPlan.php
+++ b/src/applications/harbormaster/storage/configuration/HarbormasterBuildPlan.php
@@ -85,6 +85,15 @@
   }
 
 
+  public function canRunManually() {
+    if ($this->isAutoplan()) {
+      return false;
+    }
+
+    return true;
+  }
+
+
   public function getName() {
     $autoplan = $this->getAutoplan();
     if ($autoplan) {