diff --git a/lisp/Makefile.in b/lisp/Makefile.in
index f33dd01..98743e8 100644
--- a/lisp/Makefile.in
+++ b/lisp/Makefile.in
@@ -183,6 +183,7 @@ $(lisp)/loaddefs.el: $(LOADDEFS)
 	    --eval '(setq autoload-ensure-writable t)' \
 	    --eval '(setq autoload-builtin-package-versions t)' \
 	    --eval '(setq generated-autoload-file (expand-file-name (unmsys--file-name "$@")))' \
+	    --eval '(setq make-backup-files nil)' \
 	    -f batch-update-autoloads ${SUBDIRS_ALMOST}
 
 # This is required by the bootstrap-emacs target in ../src/Makefile, so
@@ -381,7 +382,8 @@ $(MH_E_DIR)/mh-loaddefs.el: $(MH_E_SRC)
 	$(AM_V_GEN)$(emacs) -l autoload \
 	   --eval "(setq generate-autoload-cookie \";;;###mh-autoload\")" \
 	   --eval "(setq generated-autoload-file (expand-file-name (unmsys--file-name \"$@\")))" \
-	   -f batch-update-autoloads $(MH_E_DIR)
+	   --eval '(setq make-backup-files nil)' \
+           -f batch-update-autoloads $(MH_E_DIR)
 
 # Update TRAMP internal autoloads. Maybe we could move tramp*.el into
 # an own subdirectory. OTOH, it does not hurt to keep them in
@@ -394,6 +396,7 @@ $(TRAMP_DIR)/tramp-loaddefs.el: $(TRAMP_SRC)
 	$(AM_V_GEN)$(emacs) -l autoload \
 	   --eval "(setq generate-autoload-cookie \";;;###tramp-autoload\")" \
 	   --eval "(setq generated-autoload-file (expand-file-name (unmsys--file-name \"$@\")))" \
+	   --eval '(setq make-backup-files nil)' \
 	   -f batch-update-autoloads $(TRAMP_DIR)
 
 CAL_DIR = $(lisp)/calendar
@@ -406,19 +409,22 @@ $(CAL_DIR)/cal-loaddefs.el: $(CAL_SRC)
 	$(AM_V_GEN)$(emacs) -l autoload \
 	   --eval "(setq generate-autoload-cookie \";;;###cal-autoload\")" \
 	   --eval "(setq generated-autoload-file (expand-file-name (unmsys--file-name \"$@\")))" \
+	   --eval '(setq make-backup-files nil)' \
 	   -f batch-update-autoloads $(CAL_DIR)
 
 $(CAL_DIR)/diary-loaddefs.el: $(CAL_SRC) $(CAL_DIR)/cal-loaddefs.el
 	$(AM_V_GEN)$(emacs) -l autoload \
 	   --eval "(setq generate-autoload-cookie \";;;###diary-autoload\")" \
 	   --eval "(setq generated-autoload-file (expand-file-name (unmsys--file-name \"$@\")))" \
+	   --eval '(setq make-backup-files nil)' \
 	   -f batch-update-autoloads $(CAL_DIR)
 
 $(CAL_DIR)/hol-loaddefs.el: $(CAL_SRC) $(CAL_DIR)/diary-loaddefs.el
 	$(AM_V_GEN)$(emacs) -l autoload \
 	   --eval "(setq generate-autoload-cookie \";;;###holiday-autoload\")" \
 	   --eval "(setq generated-autoload-file (expand-file-name (unmsys--file-name \"$@\")))" \
-	   -f batch-update-autoloads $(CAL_DIR)
+	   --eval '(setq make-backup-files nil)' \
+           -f batch-update-autoloads $(CAL_DIR)
 
 .PHONY: bootstrap-clean distclean maintainer-clean