diff --git a/core/definitions.mk b/core/definitions.mk
index 804f2c3..4babd60 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2535,7 +2535,11 @@
 @echo Desugar: $@
 @mkdir -p $(dir $@)
 $(hide) rm -f $@ $@.tmp
-$(hide) java -jar $(DESUGAR) \
+@rm -rf $(dir $@)/desugar_dumped_classes
+@mkdir $(dir $@)/desugar_dumped_classes
+$(hide) java \
+    -Djdk.internal.lambda.dumpProxyClasses=$(abspath $(dir $@))/desugar_dumped_classes \
+    -jar $(DESUGAR) \
     $(addprefix --bootclasspath_entry ,$(call desugar-bootclasspath,$(PRIVATE_BOOTCLASSPATH))) \
     $(addprefix --classpath_entry ,$(PRIVATE_ALL_JAVA_LIBRARIES)) \
     --min_sdk_version $(call codename-or-sdk-to-sdk,$(PRIVATE_DEFAULT_APP_TARGET_SDK)) \
diff --git a/core/droiddoc.mk b/core/droiddoc.mk
index a70ab03..93d5551 100644
--- a/core/droiddoc.mk
+++ b/core/droiddoc.mk
@@ -175,6 +175,7 @@
 	$(hide) ( \
 		javadoc \
                 -encoding UTF-8 \
+                -source 1.8 \
                 \@$(PRIVATE_SRC_LIST_FILE) \
                 -J-Xmx1600m \
                 -XDignore.symbol.file \