diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index 550e07a..8617449 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -124,7 +124,7 @@
 $(built_dex): PRIVATE_CLASSES_JACK := $(full_classes_jack)
 $(built_dex): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
 $(built_dex): PRIVATE_JACK_VERSION := $(LOCAL_JACK_VERSION)
-$(built_dex): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
+$(built_dex): $(java_sources) $(java_resource_sources) $(full_jack_deps) \
         $(jar_manifest_file) $(proto_java_sources_file_stamp) $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK) | setup-jack-server
 	@echo Building with Jack: $@
diff --git a/core/host_dalvik_static_java_library.mk b/core/host_dalvik_static_java_library.mk
index 29a1aba..17b2922 100644
--- a/core/host_dalvik_static_java_library.mk
+++ b/core/host_dalvik_static_java_library.mk
@@ -46,7 +46,7 @@
 $(full_classes_jack): \
 	PRIVATE_JACK_INCREMENTAL_DIR :=
 endif
-$(full_classes_jack): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
+$(full_classes_jack): $(java_sources) $(java_resource_sources) $(full_jack_deps) \
         $(jar_manifest_file) $(layers_file) $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES) $(LOCAL_JARJAR_RULES) \
         $(JACK) | setup-jack-server
diff --git a/core/java.mk b/core/java.mk
index d1f4635..d8bbe37 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -470,6 +470,7 @@
     $(error invalid value for LOCAL_PROGUARD_ENABLED: $(LOCAL_PROGUARD_ENABLED))
 endif
 proguard_dictionary := $(intermediates.COMMON)/proguard_dictionary
+jack_dictionary := $(intermediates.COMMON)/jack_dictionary
 
 # Hack: see b/20667396
 # When an app's LOCAL_SDK_VERSION is lower than the support library's LOCAL_SDK_VERSION,
@@ -493,9 +494,11 @@
 
 # jack already has the libraries in its classpath and doesn't support jars
 legacy_proguard_flags := $(addprefix -libraryjars ,$(my_support_library_sdk_raise) $(full_shared_java_libs))
-common_proguard_flags :=  \
-                  -forceprocessing \
-                  -printmapping $(proguard_dictionary)
+
+legacy_proguard_flags += -printmapping $(proguard_dictionary)
+jack_proguard_flags := -printmapping $(jack_dictionary)
+
+common_proguard_flags := -forceprocessing
 
 ifeq ($(filter nosystem,$(LOCAL_PROGUARD_ENABLED)),)
 common_proguard_flags += -include $(BUILD_SYSTEM)/proguard.flags
@@ -538,9 +541,9 @@
     -applymapping $(link_instr_intermediates_dir.COMMON)/proguard_dictionary \
     -verbose \
     $(legacy_proguard_flags)
-# not supported with jack
 ifdef LOCAL_JACK_ENABLED
-    $(error $(LOCAL_MODULE): Build with jack of instrumentation when obfuscating is not yet supported)
+jack_proguard_flags += -applymapping $(link_instr_intermediates_dir.COMMON)/jack_dictionary
+full_jack_deps += $(link_instr_intermediates_dir.COMMON)/jack_dictionary
 endif
 
 # Sometimes (test + main app) uses different keep rules from the main app -
@@ -649,7 +652,13 @@
     $(error $(LOCAL_MODULE): Build with jack when LOCAL_TEST_MODULE_TO_PROGUARD_WITH is defined is not yet implemented)
 endif
 
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_PROGUARD_FLAGS := $(common_proguard_flags) $(LOCAL_JACK_PROGUARD_FLAGS)
+# $(jack_dictionary) is just by-product of $(built_dex_intermediate).
+# The dummy command was added because, without it, make misses the fact the $(built_dex) also
+# change $(jack_dictionary).
+$(jack_dictionary): $(full_classes_jack)
+	$(hide) touch $@
+
+$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_PROGUARD_FLAGS := $(common_proguard_flags) $(jack_proguard_flags) $(LOCAL_JACK_PROGUARD_FLAGS)
 else  # LOCAL_PROGUARD_ENABLED not defined
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_PROGUARD_FLAGS :=
 endif # LOCAL_PROGUARD_ENABLED defined
@@ -657,7 +666,7 @@
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_VERSION := $(LOCAL_JACK_VERSION)
 
-jack_all_deps := $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
+jack_all_deps := $(java_sources) $(java_resource_sources) $(full_jack_deps) \
         $(jar_manifest_file) $(layers_file) $(RenderScript_file_stamp) $(proguard_flag_files) \
         $(proto_java_sources_file_stamp) $(LOCAL_ADDITIONAL_DEPENDENCIES) $(LOCAL_JARJAR_RULES) \
         $(LOCAL_MODULE_MAKEFILE_DEP) $(JACK)
diff --git a/core/java_common.mk b/core/java_common.mk
index 08e5ee7..b88bfe4 100644
--- a/core/java_common.mk
+++ b/core/java_common.mk
@@ -306,10 +306,10 @@
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(my_bootclasspath)
 
 full_shared_jack_libs := $(call jack-lib-files,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
-full_jack_lib_deps := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+full_jack_deps := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
 # Turn off .toc optimization for apps build as we cannot build dexdump.
 ifeq (,$(TARGET_BUILD_APPS))
-full_jack_lib_deps := $(patsubst %.jack, %.dex.toc, $(full_jack_lib_deps))
+full_jack_deps := $(patsubst %.jack, %.dex.toc, $(full_jack_deps))
 endif
 
 else # LOCAL_IS_HOST_MODULE
@@ -321,16 +321,18 @@
 my_bootclasspath := $(call jack-lib-files,core-oj-hostdex core-libart-hostdex,$(LOCAL_IS_HOST_MODULE))
 endif
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES := $(my_bootclasspath)
+# Compiling against the final jack library. If we want to add support for obfuscated library
+# we'll need to change that to compile against the not obfuscated jack library.
 full_shared_jack_libs := $(call jack-lib-files,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
-full_jack_lib_deps := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
+full_jack_deps := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
 else
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_BOOTCLASSPATH_JAVA_LIBRARIES :=
 full_shared_jack_libs := $(call jack-lib-deps,$(LOCAL_JAVA_LIBRARIES),$(LOCAL_IS_HOST_MODULE))
-full_jack_lib_deps := $(full_shared_jack_libs)
+full_jack_deps := $(full_shared_jack_libs)
 endif # USE_CORE_LIB_BOOTCLASSPATH
 endif # !LOCAL_IS_HOST_MODULE
 full_jack_libs := $(full_shared_jack_libs) $(full_static_jack_libs) $(LOCAL_JACK_CLASSPATH)
-full_jack_lib_deps += $(full_static_jack_libs) $(LOCAL_JACK_CLASSPATH)
+full_jack_deps += $(full_static_jack_libs) $(LOCAL_JACK_CLASSPATH)
 
 ifndef LOCAL_IS_HOST_MODULE
 # This is set by packages that are linking to other packages that export
@@ -344,7 +346,7 @@
   # link against the jar with full original names (before proguard processing).
   full_shared_jack_libs += $(link_apk_jack_libraries)
   full_jack_libs += $(link_apk_jack_libraries)
-  full_jack_lib_deps += $(link_apk_jack_libraries)
+  full_jack_deps += $(link_apk_jack_libraries)
 endif
 
 # This is set by packages that contain instrumentation, allowing them to
@@ -354,7 +356,7 @@
    # link against the jar with full original names (before proguard processing).
    link_instr_classes_jack := $(link_instr_intermediates_dir.COMMON)/classes.noshrob.jack
    full_jack_libs += $(link_instr_classes_jack)
-   full_jack_lib_deps += $(link_instr_classes_jack)
+   full_jack_deps += $(link_instr_classes_jack)
 endif  # LOCAL_INSTRUMENTATION_FOR
 endif  # !LOCAL_IS_HOST_MODULE