diff --git a/.emacs.d/lisp/init-sly.el b/.emacs.d/lisp/init-sly.el
index 244f7ba5..d86beaa0 100644
--- a/.emacs.d/lisp/init-sly.el
+++ b/.emacs.d/lisp/init-sly.el
@@ -27,8 +27,12 @@ This dump is expected to be generated by `lisp-repl-core-dumper'."
 (setq sly-lisp-implementations
       (let* ((maybe-core-dumper (when-let ((exec (executable-find "lisp-repl-core-dumper")))
                                   (list exec)))
-             ;; Support for encrypted files and password manager:
-             (nyxt-ad-hoc-deps '("password-store" "git" "guix" "gnupg"))
+             (nyxt-ad-hoc-deps '("git"  ; For vcs-mode.
+                                 "gnupg" ;
+                                 "guix"  ; For OSPM.
+                                 "password-store"
+                                 ;; For xdg-open:
+                                 "xdg-utils"))
              (nyxt-command `("guix" "environment" "--pure"
                              "--preserve=^PERSONAL$" ; To find personal config, like engines and bookmarks.
                              "-l" ,(expand-file-name "~/common-lisp/nyxt/build-scripts/guix.scm")