diff --git a/config.scm b/config.scm
index f98ae64..928f0fd 100644
--- a/config.scm
+++ b/config.scm
@@ -44,7 +44,7 @@
      (lambda (port)
        (read port)
        (read port)
-       (last-pair (read-port))))
+       #$(last-pair (read-port))))
  #;(file-systems
   (cons*
    (file-system