Hello, Building with commit 5af5df1 results in this error when ACL support is turned on. EMACSLOADPATH= '../src/bootstrap-emacs' -batch --no-site-file --no-site-lisp --eval '(setq load-prefer-newer t)' -f batch-byte-compile emacs-lisp/macroexp.el >>Error occurred processing emacs-lisp/macroexp.el: File error (("Copying permissions to" "Invalid argument" "/wrkdirs/usr/ports/editors/emacs-devel/work-full/emacs-5af5df1f7c20858dab762830e1a94994ceda425/lisp/emacs-lisp/macroexp.elc")) The build succeeded with commit 6b8e9b7 from November 17th. J.