--- a/Makefile.in
+++ b/Makefile.in
@@ -28,17 +28,20 @@ DIST_GARBAGE = config.cache config.log c
    config/autoconf.mk \
    mozilla-config.h \
    netwerk/necko-config.h xpcom/xpcom-config.h xpcom/xpcom-private.h \
    .mozconfig.mk
 
 ifndef MOZ_PROFILE_USE
 # We need to explicitly put backend.RecursiveMakeBackend.built here
 # otherwise the rule in rules.mk doesn't run early enough.
-libs export tools:: CLOBBER $(topsrcdir)/configure config.status backend.RecursiveMakeBackend.built js-config-status
+libs export tools:: CLOBBER $(topsrcdir)/configure config.status backend.RecursiveMakeBackend.built
+ifndef LIBXUL_SDK
+libs export tools:: js-config-status
+endif
 endif
 
 CLOBBER: $(topsrcdir)/CLOBBER
 	@echo "STOP!  The CLOBBER file has changed."
 	@echo "Please run the build through a sanctioned build wrapper, such as"
 	@echo "'mach build' or client.mk."
 	@exit 1
 
@@ -51,35 +54,40 @@ CLOBBER: $(topsrcdir)/CLOBBER
 
 config.status: $(topsrcdir)/configure
 	@echo "STOP!  configure has changed and needs to be run in this build directory."
 	@echo "Please rerun configure."
 	@echo "To ignore this message, touch 'config.status' in the build directory,"
 	@echo "but your build might not succeed."
 	@exit 1
 
+ifndef LIBXUL_SDK
 .PHONY: js-config-status
 js-config-status:
 	$(call SUBMAKE,backend.RecursiveMakeBackend.built,js/src,1)
+endif
 
 install_manifests := bin idl include public private sdk
 install_manifest_depends = \
   CLOBBER \
   $(topsrcdir)/configure \
   config.status \
   backend.RecursiveMakeBackend.built \
-  js-config-status \
   $(NULL)
 
+ifndef LIBXUL_SDK
+install_manifest_depends += js-config-status
+endif
+
 .PHONY: install-manifests
 install-manifests: $(addprefix install-dist-,$(install_manifests))
 
 .PHONY: $(addprefix install-dist-,$(install_manifests))
 $(addprefix install-dist-,$(install_manifests)): install-dist-%: $(install_manifest_depends)
-	$(call py_action,process_install_manifest,$(if $(NO_REMOVE),--no-remove )$(DIST)/$* _build_manifests/install/dist_$* js/src/_build_manifests/install/dist_$*)
+	$(call py_action,process_install_manifest,$(if $(NO_REMOVE),--no-remove )$(DIST)/$* _build_manifests/install/dist_$* $(if $(LIBXUL_SDK),,js/src/_build_manifests/install/dist_$*))
 
 .PHONY: install-tests
 install-manifests: install-tests
 install-tests: $(install_manifest_depends)
 	$(call py_action,process_install_manifest,$(if $(NO_REMOVE),--no-remove )_tests _build_manifests/install/tests js/src/_build_manifests/install/tests)
 
 
 # _tests should be purged during cleaning. However, we don't want it purged
@@ -211,23 +219,25 @@ endif
 
 # Look for R_386_PC32 relocations in shared libs, these
 # break x86_64 builds and SELinux users.
 ifeq ($(OS_TARGET)_$(TARGET_XPCOM_ABI),Linux_x86-gcc3)
 scheck::
 	@relcount=`find $(DIST)/bin -name "*.so" | xargs objdump -R | grep R_386_PC32 | wc -l` && if test $$relcount -gt 0; then echo "FAILED: R_386_PC32 relocations detected in a shared library.  Did you use a system header without adding it to config/system-headers?"; exit 1; else echo "PASSED"; fi
 endif
 
+ifndef LIBXUL_SDK
 js/src/Makefile: subsrcdir := js/src
 
 ifdef ENABLE_TESTS
 # Incorporate static tier directories into tests. This should be incorporated
 # into moz.build files someday.
 check::
 	$(call SUBMAKE,$@,js/src)
 endif
 
 ifdef MOZ_PSEUDO_DERECURSE
 # Interdependencies for parallel export.
 js/xpconnect/src/export: dom/bindings/export
 accessible/src/xpcom/export: xpcom/xpidl/export
 js/src/export: mfbt/export
 endif
+endif