diff --git a/README.org b/README.org
index 4e0eb2b..ea93183 100644
--- a/README.org
+++ b/README.org
@@ -226,11 +226,8 @@ The [[info:emacs#Init File][init file (info)]] does not load the ~custom-file~ a
      '(async              ; asynchroneous processing
        auctex             ; Aalborg University Center TeX
        company            ; complete anything
-       consult            ; consult completing-read
-       embark             ; act on any buffer selection
        engrave-faces      ; convert font-lock faces to text
        magit              ; Git Text-based User Interface
-       marginalia         ; minibuffer margin notes
        no-littering       ; keep `user-emacs-directory' clean
        orderless          ; Emacs completion style
        org                ; thought organizer
@@ -1095,15 +1092,16 @@ Listing [[lst:configure-orderless]] configures [[info:orderless#Company][orderle
 #+caption: Configure =orderless=.
 #+name: lst:configure-orderless
 #+begin_src emacs-lisp
-  (with-eval-after-load 'orderless
-    (custom-set-variables
-     '(orderless-component-separator " +"))
+  (when (ensure-package-installation 'marginalia)
+    (with-eval-after-load 'orderless
+      (custom-set-variables
+       '(orderless-component-separator " +"))
 
-    (defun just-one-face (fn &rest args)
-      (let ((orderless-match-faces [completions-common-part]))
-        (apply fn args)))
+      (defun just-one-face (fn &rest args)
+        (let ((orderless-match-faces [completions-common-part]))
+          (apply fn args)))
 
-    (advice-add 'company-capf--candidates :around #'just-one-face))
+      (advice-add 'company-capf--candidates :around #'just-one-face)))
 #+end_src
 
 ** [[info:embark#Top][Embark (info)]]
@@ -1130,11 +1128,15 @@ Listing [[lst:configure-embark]] configures =embark= key bindings:
 #+caption: Configure =embark=.
 #+name: lst:configure-embark
 #+begin_src emacs-lisp
-  (when (cl-every #'fboundp '(embark-act embark-bindings embark-dwim))
-    (global-set-key (kbd "C-,") #'embark-act)
-    (global-set-key (kbd "C-:") #'embark-dwim)
-    (global-set-key (kbd "C-h B") #'embark-bindings)
-    (setq prefix-help-command #'embark-prefix-help-command))
+  (when (ensure-package-installation 'embark)
+    (when (fboundp 'embark-act)
+      (global-set-key (kbd "C-,") #'embark-act))
+    (when (fboundp 'embark-dwim)
+      (global-set-key (kbd "C-:") #'embark-dwim))
+    (when (fboundp 'embark-bindings)
+      (global-set-key (kbd "C-h B") #'embark-bindings))
+    (when (fboundp 'embark-prefix-help-command)
+      (setq prefix-help-command #'embark-prefix-help-command)))
 #+end_src
 
 ** [[info:marginalia#Top][Marginalia (info)]]
@@ -1148,7 +1150,8 @@ Listing [[lst:enable-marginalia-mode]] enables =marginalia-mode=.
 #+caption: Enable =marginalia-mode=.
 #+name: lst:enable-marginalia-mode
 #+begin_src emacs-lisp
-  (when (fboundp 'marginalia-mode)
+  (when (and (ensure-package-installation 'marginalia)
+             (fboundp 'marginalia-mode))
     (marginalia-mode +1))
 #+end_src
 
@@ -1157,7 +1160,8 @@ Listing [[lst:enable-marginalia-mode]] enables =marginalia-mode=.
 :CUSTOM_ID: sec:consult-configuration
 :END:
 
-Listing [[lst:configure-consult]] configures =consult=.
+Consult provides practical commands based on the Emacs minibuffer completion
+function [[info:elisp#Minibuffer Completion][completing-read]].  Listing [[lst:configure-consult]] configures =consult=.
 
 #+attr_latex: :booktabs yes :float table
 #+caption[Configuration specific key bindings]:
@@ -1211,7 +1215,7 @@ Listing [[lst:configure-consult]] configures =consult=.
 #+caption: Configure =consult=.
 #+name: lst:configure-consult
 #+begin_src emacs-lisp
-  (when (fboundp 'consult-apropos)
+  (when (ensure-package-installation 'consult)
     (custom-set-variables
      '(consult-project-function #'(lambda (_) (vc-root-dir))))
     ;; C-c bindings (current-global-map)