diff -up nss/cmd/Makefile.skipthem nss/cmd/Makefile
--- nss/cmd/Makefile.skipthem	2020-06-17 00:50:59.000000000 +0200
+++ nss/cmd/Makefile	2020-07-28 16:39:14.398475287 +0200
@@ -19,7 +19,11 @@ BLTEST_SRCDIR =
 ECPERF_SRCDIR =
 FREEBL_ECTEST_SRCDIR =
 FIPSTEST_SRCDIR =
+ifeq ($(NSS_BLTEST_NOT_AVAILABLE),1)
+SHLIBSIGN_SRCDIR = shlibsign
+else
 SHLIBSIGN_SRCDIR =
+endif
 else
 BLTEST_SRCDIR = bltest
 ECPERF_SRCDIR = ecperf
diff -up nss/cmd/shlibsign/Makefile.skipthem nss/cmd/shlibsign/Makefile
--- nss/cmd/shlibsign/Makefile.skipthem	2020-07-28 16:39:58.263169490 +0200
+++ nss/cmd/shlibsign/Makefile	2020-07-28 16:40:04.485126117 +0200
@@ -94,6 +94,3 @@ else
 	$(call core_abspath,$(NSPR_LIB_DIR)) $(call core_abspath,$<)
     endif
 endif
-
-libs: install
-	$(MAKE) $(CHECKLOC)