diff --git a/src/lint/linter/ArcanistExternalLinter.php b/src/lint/linter/ArcanistExternalLinter.php
--- a/src/lint/linter/ArcanistExternalLinter.php
+++ b/src/lint/linter/ArcanistExternalLinter.php
@@ -277,9 +277,9 @@
     $binary = $this->getBinary();
 
     if ($interpreter) {
-      $bin = csprintf('%s %s', $interpreter, $binary);
+      $bin = csprintf('%C %s', $interpreter, $binary);
     } else {
-      $bin = csprintf('%s', $binary);
+      $bin = csprintf('%C', $binary);
     }
 
     return $bin;
@@ -332,7 +332,6 @@
     $executable = $this->getExecutableCommand();
 
     $bin = csprintf('%C %Ls', $executable, $this->getCommandFlags());
-
     $futures = array();
     foreach ($paths as $path) {
       $disk_path = $this->getEngine()->getFilePathOnDisk($path);