diff --git a/debian/Makefile b/debian/Makefile
index 581dbaa5..8ecae9b7 100644
--- a/debian/Makefile
+++ b/debian/Makefile
@@ -279,7 +279,10 @@ rules-module-%: $(BASE_SRC) nginx-module-%.deb-changelog .deps-module-%
 		if [ "$${sn}" = "$${src}" ] ; then \
 			sn=$${src%-*} ; \
 		fi ; \
-		( cd $${builddir}/$(SRCDIR)/debian/extra && ln -s $${sn}-* $${sn} ) ; \
+		( cd $${builddir}/$(SRCDIR)/debian/extra && \
+			if [ ! -e "$${sn}" ] && [ ! -L "$${sn}" ]; then \
+				ln -s $${sn}-* "$${sn}"; \
+			fi ) ; \
 	done ; \
 	for p in $(MODULE_PATCHES_$(call modname, $*)); do \
 		dn=`dirname $${p}` ; \
diff --git a/debian/Makefile.module-acme b/debian/Makefile.module-acme
index 6fe2056d..ba5b8a08 100644
--- a/debian/Makefile.module-acme
+++ b/debian/Makefile.module-acme
@@ -21,6 +21,7 @@ MODULE_CONFARGS_acme=	--add-dynamic-module=$(MODSRC_PREFIX)nginx-acme-$(NGINX_AC
 MODULE_BUILD_DEPENDS_acme=,clang
 
 define MODULE_DEFINITIONS_acme
+export DH_ALWAYS_EXCLUDE=Cargo.toml.orig
 export CARGO_PROFILE_RELEASE_DEBUG=true
 export CARGO_PROFILE_RELEASE_STRIP=none
 export NGX_ACME_STATE_PREFIX=/var/cache/nginx