diff --git a/package-build.el b/package-build.el
index df40ce8..676101b 100644
--- a/package-build.el
+++ b/package-build.el
@@ -1473,8 +1473,11 @@ Return the archive entry for the package and store the package
 in `package-build-archive-dir'."
   (let ((default-directory (package-build--working-tree rcp)))
     (unwind-protect
-        (progn
+        (let ((process-environment (copy-sequence process-environment)))
           (funcall package-build-checkout-function rcp)
+          (setenv "PACKAGE_VERSION"  (package-build--get-version rcp))
+          (setenv "PACKAGE_REVISION" (package-build--get-commit  rcp))
+          ;; (setenv "PACKAGE_REVDESC"  (package-build--get-revdesc rcp))
           (when-let ((command (oref rcp shell-command)))
             (package-build--message "Running %s" command)
             (package-build--run-sandboxed