diff --git a/package-build.el b/package-build.el
index e572045..9eb0f82 100644
--- a/package-build.el
+++ b/package-build.el
@@ -415,7 +415,7 @@ (defun package-build--write-pkg-file (desc dir)
       (princ ";; Local Variables:\n;; no-byte-compile: t\n;; End:\n"
              (current-buffer)))))
 
-(defun package-build--create-tar (name version directory mtime)
+(defun package-build--create-tar (name version directory)
   "Create a tar file containing the contents of VERSION of package NAME.
 DIRECTORY is a temporary directory that contains the directory
 that is put in the tarball.  MTIME is used as the modification
@@ -434,7 +434,7 @@ (defun package-build--create-tar (name version directory mtime)
        ;; prevent a reproducable tarball as described at
        ;; https://reproducible-builds.org/docs/archives.
        "--sort=name"
-       (format "--mtime=@%d" mtime)
+       "--mtime=@0"
        "--owner=0" "--group=0" "--numeric-owner"
        "--pax-option=exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime"))
     (when (and package-build-verbose noninteractive)
@@ -848,12 +848,11 @@ (defun package-build--build-multi-file-package (rcp version commit files source-
                            (package-build--desc-from-library
                             name version commit files 'tar)
                            (error "%s[-pkg].el matching package name is missing"
-                                  name))))
-               (mtime (package-build--get-commit-time rcp commit)))
+                                  name)))))
           (package-build--copy-package-files files source-dir target)
           (package-build--write-pkg-file desc target)
           (package-build--generate-info-files files source-dir target)
-          (package-build--create-tar name version tmp-dir mtime)
+          (package-build--create-tar name version tmp-dir)
           (package-build--write-pkg-readme name files source-dir)
           (package-build--write-archive-entry desc))
       (delete-directory tmp-dir t nil))))
-- 
2.37.2