diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index b1a0e3d..3a09019 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -9,7 +9,10 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 The format of this change log follows the advice given at [Keep a CHANGELOG](http://keepachangelog.com).
 
 ## [Unreleased]
-No unreleased changes.
+### Fixed
+- `moodle-plugin-ci grunt` now only runs against the `yui/src` directory when configuring the YUI task.
+  This resolves an issue where an "Unable to find local grunt" message was reported when code was structured in a legacy
+  format. See #46 for more details.
 
 ## [3.0.3] - 2020-10-16
 ### Changed
diff --git a/src/Command/GruntCommand.php b/src/Command/GruntCommand.php
index 9749d40..8942e80 100644
--- a/src/Command/GruntCommand.php
+++ b/src/Command/GruntCommand.php
@@ -184,12 +184,12 @@ public function toGruntTask($task)
                 return new GruntTaskModel($task, $amdDir, 'amd/build');
             case 'shifter':
             case 'yui':
-                $yuiDir = $this->plugin->directory.'/yui';
+                $yuiDir = $this->plugin->directory.'/yui/src';
                 if (!is_dir($yuiDir)) {
                     return null;
                 }
 
-                return new GruntTaskModel($task, $yuiDir.'/src', 'yui/build');
+                return new GruntTaskModel($task, $yuiDir, 'yui/build');
             case 'gherkinlint':
                 if ($this->moodle->getBranch() < 33 || !$this->plugin->hasBehatFeatures()) {
                     return null;
diff --git a/tests/Command/GruntCommandTest.php b/tests/Command/GruntCommandTest.php
index bfa67c1..bf2e9e6 100644
--- a/tests/Command/GruntCommandTest.php
+++ b/tests/Command/GruntCommandTest.php
@@ -97,6 +97,16 @@ public function testToGruntTaskWithYUI()
         $this->assertNull($command->toGruntTask('shifter'));
     }
 
+    public function testToGruntTaskWithLegacyYUI()
+    {
+        $command = $this->newCommand();
+        $this->fs->remove($this->pluginDir.'/yui/src');
+        $this->fs->touch($this->pluginDir.'/yui/examplejs');
+
+        $this->assertNull($command->toGruntTask('yui'));
+        $this->assertNull($command->toGruntTask('shifter'));
+    }
+
     public function testToGruntTaskWithGherkin()
     {
         $command = $this->newCommand();