--- a/config/rules.mk
+++ b/config/rules.mk
@@ -811,18 +811,26 @@ else # ! DTRACE_LIB_DEPENDENT
 	$(EXPAND_MKSHLIB) $(SHLIB_LDSTARTFILE) $(OBJS) $(SUB_SHLOBJS) $(RESFILE) $(LDFLAGS) $(WRAP_LDFLAGS) $(STATIC_LIBS) $(RUST_STATIC_LIB_FOR_SHARED_LIB) $(SHARED_LIBS) $(EXTRA_DSO_LDOPTS) $(MOZ_GLUE_LDFLAGS) $(EXTRA_LIBS) $(OS_LIBS) $(SHLIB_LDENDFILE)
 endif # DTRACE_LIB_DEPENDENT
 	$(call CHECK_BINARY,$@)
 
 ifeq (_WINNT,$(GNU_CC)_$(OS_ARCH))
 ifdef MSMANIFEST_TOOL
 ifdef EMBED_MANIFEST_AT
 	@if test -f $@.manifest; then \
-		$(MT) -NOLOGO -MANIFEST $@.manifest -OUTPUTRESOURCE:$@\;$(EMBED_MANIFEST_AT); \
-		rm -f $@.manifest; \
+		if test -f '$(srcdir)/$@.manifest'; then \
+			echo 'Embedding manifest from $(srcdir)/$@.manifest and $@.manifest'; \
+			$(MT) -NOLOGO -MANIFEST '$(win_srcdir)/$@.manifest' $@.manifest -OUTPUTRESOURCE:$@\;$(EMBED_MANIFEST_AT); \
+		else \
+			echo 'Embedding manifest from $@.manifest'; \
+			$(MT) -NOLOGO -MANIFEST $@.manifest -OUTPUTRESOURCE:$@\;$(EMBED_MANIFEST_AT); \
+		fi; \
+	elif test -f '$(srcdir)/$@.manifest'; then \
+		echo 'Embedding manifest from $(srcdir)/$@.manifest'; \
+		$(MT) -NOLOGO -MANIFEST '$(win_srcdir)/$@.manifest' -OUTPUTRESOURCE:$@\;$(EMBED_MANIFEST_AT); \
 	fi
 endif   # EMBED_MANIFEST_AT
 endif	# MSVC with manifest tool
 ifdef MOZ_PROFILE_GENERATE
 	touch -t `date +%Y%m%d%H%M.%S -d 'now+5seconds'` pgo.relink
 endif
 endif	# WINNT && !GCC
 	chmod +x $@