diff --git a/toolkit/mozapps/installer/packager.mk b/toolkit/mozapps/installer/packager.mk
index b3a96c722d3c..8ea1f1a3c3ba 100644
--- a/toolkit/mozapps/installer/packager.mk
+++ b/toolkit/mozapps/installer/packager.mk
@@ -397,8 +397,18 @@ endif
 
 ifdef MOZ_OMNIJAR
 
+# Set MOZ_CAN_RUN_PROGRAMS for trivial cases.
+ifndef MOZ_CAN_RUN_PROGRAMS
+ifdef UNIVERSAL_BINARY
+MOZ_CAN_RUN_PROGRAMS=1
+endif
+ifndef CROSS_COMPILE
+MOZ_CAN_RUN_PROGRAMS=1
+endif
+endif # MOZ_CAN_RUN_PROGRAMS
+
 ifdef GENERATE_CACHE
-ifneq (1_,$(if $(CROSS_COMPILE),1,0)_$(UNIVERSAL_BINARY))
+ifdef MOZ_CAN_RUN_PROGRAMS
 ifdef RUN_TEST_PROGRAM
 _ABS_RUN_TEST_PROGRAM = $(call core_abspath,$(RUN_TEST_PROGRAM))
 endif
@@ -477,7 +487,7 @@ endif
 
 # dummy macro if we don't have PSM built
 SIGN_NSS		=
-ifneq (1_,$(if $(CROSS_COMPILE),1,0)_$(UNIVERSAL_BINARY))
+ifdef MOZ_CAN_RUN_PROGRAMS
 ifdef MOZ_PSM
 SIGN_NSS		= @echo signing nss libraries;