diff --git a/include/package-pack.mk b/include/package-pack.mk
index a36d6909016..411bae825a9 100644
--- a/include/package-pack.mk
+++ b/include/package-pack.mk
@@ -302,7 +302,7 @@ else
 		echo 'export pkgname="$(1)"'; \
 		echo "add_group_and_user"; \
 		echo "default_postinst"; \
-		[ ! -f $$(ADIR_$(1))/postinst-pkg ] || cat "$$(ADIR_$(1))/postinst-pkg"; \
+		[ ! -f $$(ADIR_$(1))/postinst-pkg ] || sed -z 's/^\s*#!/#!/' "$$(ADIR_$(1))/postinst-pkg"; \
 	) > $$(ADIR_$(1))/post-install;
 
 	( \
@@ -312,9 +312,11 @@ else
 		echo 'export root="$$$${IPKG_INSTROOT}"'; \
 		echo 'export pkgname="$(1)"'; \
 		echo "default_prerm"; \
-		[ ! -f $$(ADIR_$(1))/prerm-pkg ] || cat "$$(ADIR_$(1))/prerm-pkg"; \
+		[ ! -f $$(ADIR_$(1))/prerm-pkg ] || sed -z 's/^\s*#!/#!/' "$$(ADIR_$(1))/prerm-pkg"; \
 	) > $$(ADIR_$(1))/pre-deinstall;
 
+	[ ! -f $$(ADIR_$(1))/postrm ] || sed -zi 's/^\s*#!/#!/' "$$(ADIR_$(1))/postrm";
+
 	if [ -n "$(USERID)" ]; then echo $(USERID) > $$(IDIR_$(1))/lib/apk/packages/$(1).rusers; fi;
 	if [ -n "$(ALTERNATIVES)" ]; then echo $(ALTERNATIVES) > $$(IDIR_$(1))/lib/apk/packages/$(1).alternatives; fi;
 	(cd $$(IDIR_$(1)) && find . -type f,l -printf "/%P\n" > $$(IDIR_$(1))/lib/apk/packages/$(1).list)