gnu: Add emacs-amx.

* gnu/packages/emacs-xyz.scm (emacs-amx): New variable.

gnu/packages/emacs-xyz.scm

@@ -13183,3 +13183,27 @@ used to link to certain Magit buffers.  Use the command
 Later you can insert it into an Org buffer using the command
 @code{org-insert-link}.")
       (license license:gpl3+))))
+
+(define-public emacs-amx
+  (package
+    (name "emacs-amx")
+    (version "3.2")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/DarwinAwardWinner/amx")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0bb8y1dmzyqkrb4mg6zndcsxppby3glridv2aap2pv05gv8kx7mj"))))
+    (build-system emacs-build-system)
+    (propagated-inputs `(("emacs-s" ,emacs-s)))
+    (home-page "https://github.com/DarwinAwardWinner/amx")
+    (synopsis "Alternative interface for M-x")
+    (description "Amx is an alternative interface for M-x in Emacs.  It
+provides several enhancements over the ordinary
+@code{execute-extended-command}, such as prioritizing your most-used commands
+in the completion list and showing keyboard shortcuts, and it supports several
+completion systems for selecting commands, such as ido and ivy.")
+    (license license:gpl3+)))