Merge pull request #87 from leungbk/package--prepare-dependencies

Account for Emacs 30's relocation of package--prepare-dependencies

package-build.el

@@ -1085,10 +1085,12 @@ value specified in the file \"NAME.el\"."
 ^;;; [^ ]*\\.el ---[ \t]*\\(.*?\\)[ \t]*\\(-\\*-.*-\\*-[ \t]*\\)?$" nil t)
                        (match-string-no-properties 1)))
                 "No description available.")
-            (when-let ((require-lines (lm-header-multiline "package-requires")))
-              (package--prepare-dependencies
-               (package-read-from-string
-                (mapconcat #'identity require-lines " "))))
+            (if (fboundp 'lm-package-requires)
+                (lm-package-requires)
+              (when-let ((require-lines (lm-header-multiline "package-requires")))
+                (package--prepare-dependencies
+                 (package-read-from-string
+                  (mapconcat #'identity require-lines " ")))))
             ;; `:kind' and `:archive' are handled separately.
             :kind       (or kind 'single)
             ;; The other keyword arguments are appended to the alist