Helm: Filter out dotted commands from helm-run-external-command

.emacs.d/lisp/init-helm.el

@@ -327,4 +327,13 @@ With prefix argument, UPDATE the databases with custom uptions thanks to the
                               (file-name-extension candidate)))))
    1))
 
+(defun ambrevar/helm-external-command-cleanup-dotted (&optional _ignore)
+  "Remove dotted programs from `helm-run-external-command' list.
+Useful for Guix."
+  (setq helm-external-commands-list
+        (cl-delete-if (lambda (p) (string-prefix-p "." p))
+                      helm-external-commands-list)))
+(advice-add 'helm-external-commands-list-1
+            :after #'ambrevar/helm-external-command-cleanup-dotted)
+
 (provide 'init-helm)