diff --git a/GNUmakefile b/GNUmakefile
index 7503828..aa165a8 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -14,7 +14,7 @@ package-oni-conf:
 	emacs --batch \
 	    --load oni-package.el \
 	    --funcall package-initialize \
-	    --eval '(package-upload-file (car (file-expand-wildcards "oni-conf/dist/*.tar")))'
+	    --eval "(package-upload-file (car (sort (file-expand-wildcards \"oni-conf/dist/*.tar\") #'string>)))"
 
 install-%:
 	emacs --batch \