diff --git a/tests/nar.scm b/tests/nar.scm
index 9bc5a1962ed7b99ef888d792f2eddd29ab689bc2..6493d76876f19f61bd745005f7d9e46c6196bf4a 100644
--- a/tests/nar.scm
+++ b/tests/nar.scm
@@ -153,7 +153,7 @@ (define (rm-rf dir)
 
 (define %test-dir
   ;; An output directory under $top_builddir.
-  (string-append (dirname (search-path %load-path "configure"))
+  (string-append (dirname (search-path %load-path "pre-inst-env"))
                  "/test-nar-" (number->string (getpid))))