diff --git a/template/build/core/phing/phingcludes/FilterFileListByFileSetTask.php b/template/build/core/phing/phingcludes/FilterFileListByFileSetTask.php
index a8630fd74..e0a777f72 100644
--- a/template/build/core/phing/phingcludes/FilterFileListByFileSetTask.php
+++ b/template/build/core/phing/phingcludes/FilterFileListByFileSetTask.php
@@ -27,11 +27,6 @@ public function setFileList($fileList)
     $this->fileList = $fileList;
   }
 
-  public function setRoot($root)
-  {
-    $this->root = $root;
-  }
-
   /**
    * Nested adder, adds a set of files (nested fileset attribute).
    *
@@ -68,10 +63,6 @@ public function main() {
       throw new BuildException("You must set the file property.");
     }
 
-    if (!isset($this->root)) {
-      throw new BuildException("You must set the project root.");
-    }
-
     if (count($this->filesets) == 0) {
       throw new BuildException("You must define a fileset.");
     }
@@ -90,7 +81,7 @@ public function main() {
   }
 
   protected function prependProjectPath($relative_path) {
-    return $this->root. DIRECTORY_SEPARATOR . $relative_path;
+    return $this->project->getBasedir()->getAbsolutePath() . DIRECTORY_SEPARATOR . $relative_path;
   }
 
   /**
diff --git a/template/build/core/phing/tasks/validate.xml b/template/build/core/phing/tasks/validate.xml
index 964701d59..36f6fc763 100644
--- a/template/build/core/phing/tasks/validate.xml
+++ b/template/build/core/phing/tasks/validate.xml
@@ -19,7 +19,7 @@
     <fail unless="files" message="Missing files parameter."/>
     <property name="phpcs.ruleset" value="${repo.root}/vendor/drupal/coder/coder_sniffer/Drupal/ruleset.xml"/>
 
-    <filterFileListByFileSet fileList="${files}" returnProperty="filteredFileList" root="${repo.root}">
+    <filterFileListByFileSet fileList="${files}" returnProperty="filteredFileList">
       <fileset refid="files.php.custom.modules"/>
       <fileset refid="files.php.custom.themes"/>
       <fileset refid="files.php.tests"/>