diff -Naur nss-3.29.5.orig/nss/cmd/shlibsign/Makefile nss-3.29.5/nss/cmd/shlibsign/Makefile
--- nss-3.29.5.orig/nss/cmd/shlibsign/Makefile	2017-09-08 10:56:01.663876686 +0200
+++ nss-3.29.5/nss/cmd/shlibsign/Makefile	2017-09-08 10:57:19.659306831 +0200
@@ -95,7 +95,9 @@
     endif
 endif
 
+ifndef SKIP_SHLIBSIGN
 libs: install
 ifdef CHECKLOC
 	$(MAKE) $(CHECKLOC)
 endif
+endif