Error when using helm setup with use-package

Question

My current helm configuration is

(use-package helm
  :bind (("M-x" . helm-M-x)
         ("C-x b" . helm-mini)
         ("C-x C-f" . helm-find-files)
         ("C-x C-d" . helm-browse-project)
         ("M-y" . helm-show-kill-ring))
  )
(helm-mode 1)
(setq helm-M-x-fuzzy-match 1)
(setq helm-buffers-fuzzy-matching 1)
(setq helm-recentf-fuzzy-match    1)

This works, but I wish it were more idiomatic. If I try to put the trailing commands in :config, like so:

(use-package helm
  :bind (("M-x" . helm-M-x)
         ("C-x b" . helm-mini)
         ("C-x C-f" . helm-find-files)
         ("C-x C-d" . helm-browse-project)
         ("M-y" . helm-show-kill-ring))
  :config ((helm-mode 1)
           (setq helm-M-x-fuzzy-match 1)
           (setq helm-buffers-fuzzy-matching 1)
           (setq helm-recentf-fuzzy-match 1))
  )

I get the error Error (use-package): helm/:config: Invalid function: (helm-mode 1). Does anyone know what's going on here?

For reference, I'm using Emacs 28.2 on Ubuntu 22.10 with straight.el, and use-package is configured to use straight by default, like so:

(use-package straight
  :custom (straight-use-package-by-default t))

Answer 1

The :config clause has too many parens and should read:

(use-package helm
  :bind (("M-x" . helm-M-x)
         ("C-x b" . helm-mini)
         ("C-x C-f" . helm-find-files)
         ("C-x C-d" . helm-browse-project)
         ("M-y" . helm-show-kill-ring))
  :config  (helm-mode 1)
           (setq helm-M-x-fuzzy-match 1)
           (setq helm-buffers-fuzzy-matching 1)
           (setq helm-recentf-fuzzy-match 1)
  )

In your version, emacs evaluates a list whose first entry it expects to be a function (as it always does) but gets (helm-mode 1) instead.