diff --git a/template/prelude.c.tmpl b/template/prelude.c.tmpl
index 71f015fcee..4b3a38e3b1 100644
--- a/template/prelude.c.tmpl
+++ b/template/prelude.c.tmpl
@@ -70,7 +70,7 @@ class Prelude
     result
   end
 end
-Prelude.new(output && output[/\w+(?=_prelude.c\b)/] || 'prelude', ARGV, vpath).instance_eval do
+Prelude.new(output, ARGV, vpath).instance_eval do
 -%>
 /* -*-c-*-
  THIS FILE WAS AUTOGENERATED BY template/prelude.c.tmpl. DO NOT EDIT.