diff --git a/.emacs.d/lisp/init-sly.el b/.emacs.d/lisp/init-sly.el
index 0423e308..e713d045 100644
--- a/.emacs.d/lisp/init-sly.el
+++ b/.emacs.d/lisp/init-sly.el
@@ -44,7 +44,8 @@ If REFRESH is non-nil, rebuild the environment."
 
 ;; Warning: ,restart-lisp does not take changes into account, the buffer must be re-created.
 (setq sly-lisp-implementations
-      (let ((maybe-core-dumper (executable-find "lisp-repl-core-dumpers")))
+      (let ((maybe-core-dumper (when-let ((exec (executable-find "lisp-repl-core-dumper")))
+                                 (list exec))))
         `((sbcl-ambrevar ("lisp-repl-core-dumper" "-p" "ambrevar" "sbcl" "--eval" "(in-package :ambrevar/shell)"))
           (sbcl (,@maybe-core-dumper "sbcl"))
           (sbcl-nyxt (lambda () (ambrevar/sbcl-for-nyxt)))