diff --git a/src/params.lisp b/src/params.lisp
index a49fc91..f3a9f3b 100644
--- a/src/params.lisp
+++ b/src/params.lisp
@@ -35,7 +35,7 @@
 
 (in-package :pgloader.params)
 
-(defparameter *release* t
+(defparameter *release* nil
   "non-nil when this build is a release build.")
 
 (defparameter *major-version* "3.3")