diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index fed91e8..e2b8516 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -109,7 +109,6 @@
 LOCAL_ALLOW_UNDEFINED_SYMBOLS:=
 LOCAL_DX_FLAGS:=
 LOCAL_JACK_ENABLED:=$(DEFAULT_JACK_ENABLED) # '' (ie disabled), disabled, full, incremental
-LOCAL_JACK_VM_ARGS := $(DEFAULT_JACK_VM_ARGS)
 LOCAL_JACK_EXTRA_ARGS := $(DEFAULT_JACK_EXTRA_ARGS)
 LOCAL_JACK_FLAGS:=
 LOCAL_JILL_FLAGS:=
diff --git a/core/config.mk b/core/config.mk
index 848a462..70ff9bf 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -427,9 +427,7 @@
 # Generic tools.
 JACK := $(HOST_OUT_EXECUTABLES)/jack
 JACK_JAR := $(HOST_OUT_JAVA_LIBRARIES)/jack.jar
-JACK_LAUNCHER_JAR := $(HOST_OUT_JAVA_LIBRARIES)/jack-launcher.jar
 JILL_JAR := $(HOST_OUT_JAVA_LIBRARIES)/jill.jar
-JACK_MULTIDEX_DEFAULT_PREPROCESSOR := frameworks/multidex/library/resources/JACK-INF/legacyMultidexInstallation.jpp
 
 LEX := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/flex/flex-2.5.39
 # The default PKGDATADIR built in the prebuilt bison is a relative path
@@ -488,27 +486,12 @@
 else
 DEFAULT_JACK_ENABLED:=
 endif
-ifneq ($(strip $(ANDROID_JACK_VM)),)
-JACK_VM := $(ANDROID_JACK_VM)
-else
-JACK_VM := java
-endif
 # call jack
 #
-# $(1): vm arguments
-# $(2): jack perf arguments
-ifneq (,$(strip $(filter dist,$(MAKECMDGOALS))))
-JACK_SERVER_LOG_COMMAND := mkdir -p $(DIST_DIR)/logs/; SERVER_LOG=$(DIST_DIR)/logs/jack-server.log
-endif
+# $(1): jack perf arguments
 define call-jack
-$(JACK_SERVER_LOG_COMMAND) JACK_VM_COMMAND="$(JACK_VM) $(1) $(JAVA_TMPDIR_ARG) -jar $(JACK_LAUNCHER_JAR) " JACK_JAR="$(JACK_JAR)" $(JACK) $(2)
+$(JACK) $(1)
 endef
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_VM_ARGS := $(DEFAULT_JACK_VM_ARGS)
-ifneq ($(ANDROID_JACK_VM_ARGS),)
-DEFAULT_JACK_VM_ARGS := $(ANDROID_JACK_VM_ARGS)
-else
-DEFAULT_JACK_VM_ARGS := -Dfile.encoding=UTF-8 -Xms2560m -XX:+TieredCompilation
-endif
 ifneq ($(ANDROID_JACK_EXTRA_ARGS),)
 DEFAULT_JACK_EXTRA_ARGS := $(ANDROID_JACK_EXTRA_ARGS)
 else
diff --git a/core/definitions.mk b/core/definitions.mk
index bdc4fd3..c8ccf3c 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1877,7 +1877,7 @@
 else \
     export tmpEcjArg=""; \
 fi; \
-$(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
+$(call call-jack,$(PRIVATE_JACK_EXTRA_ARGS)) \
     $(strip $(PRIVATE_JACK_FLAGS)) \
     $(if $(NO_OPTIMIZE_DX), \
         -D jack.dex.optimize="false") \
@@ -1896,7 +1896,7 @@
     $(addprefix --config-jarjar ,$(strip $(PRIVATE_JARJAR_RULES))) \
     $(if $(PRIVATE_JACK_PROGUARD_FLAGS),--config-proguard $@.flags) \
     $$tmpEcjArg \
-    || ( rm -rf $(PRIVATE_CLASSES_JACK); rm -rf $(PRIVATE_JACK_INTERMEDIATES_DIR); exit 41 )
+    || ( rm -rf $(PRIVATE_CLASSES_JACK); exit 41 )
 $(hide) mv $(PRIVATE_JACK_INTERMEDIATES_DIR)/classes*.dex $(dir $@)
 $(hide) rm -f $(PRIVATE_JACK_INTERMEDIATES_DIR)/java-source-list
 $(if $(PRIVATE_EXTRA_JAR_ARGS),$(hide) rm -rf $@.res.tmp)
@@ -1912,7 +1912,7 @@
 	$(hide) mkdir -p $@.tmpjill.res
 	$(hide) $(call unzip-jar-files,$<,$@.tmpjill.res)
 	$(hide) find $@.tmpjill.res -iname "*.class" -delete
-	$(hide) $(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
+	$(hide) $(call call-jack,$(PRIVATE_JACK_EXTRA_ARGS)) \
         -D jack.import.resource.policy=keep-first \
         -D jack.import.type.policy=keep-first \
 	    --import $@.tmpjill.jack \
@@ -1956,7 +1956,7 @@
 else \
     export tmpEcjArg=""; \
 fi; \
-$(call call-jack,$(PRIVATE_JACK_VM_ARGS),$(PRIVATE_JACK_EXTRA_ARGS)) \
+$(call call-jack,$(PRIVATE_JACK_EXTRA_ARGS)) \
     $(strip $(PRIVATE_JACK_FLAGS)) \
     $(if $(NO_OPTIMIZE_DX), \
         -D jack.dex.optimize="false") \
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index 37355b5..c6fbb9f 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -125,7 +125,7 @@
 $(built_dex): PRIVATE_JACK_FLAGS := $(GLOBAL_JAVAC_DEBUG_FLAGS) $(LOCAL_JACK_FLAGS)
 $(built_dex): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
         $(jar_manifest_file) $(proto_java_sources_file_stamp) $(LOCAL_MODULE_MAKEFILE_DEP) \
-        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JACK)
 	@echo Building with Jack: $@
 	$(jack-java-to-dex)
 
diff --git a/core/host_dalvik_static_java_library.mk b/core/host_dalvik_static_java_library.mk
index 8255e5e..6c2ddb5 100644
--- a/core/host_dalvik_static_java_library.mk
+++ b/core/host_dalvik_static_java_library.mk
@@ -48,7 +48,7 @@
 $(full_classes_jack): $(java_sources) $(java_resource_sources) $(full_jack_lib_deps) \
         $(jar_manifest_file) $(layers_file) $(LOCAL_MODULE_MAKEFILE_DEP) \
         $(LOCAL_ADDITIONAL_DEPENDENCIES) $(LOCAL_JARJAR_RULES) \
-        $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+        $(JACK)
 	@echo Building with Jack: $@
 	$(java-to-jack)
 
diff --git a/core/java.mk b/core/java.mk
index f78bee2..2cf42cb 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -648,7 +648,7 @@
 jack_all_deps := $(java_sources) $(java_resource_sources) $(full_jack_lib_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_JAR) $(JACK_LAUNCHER_JAR)
+        $(LOCAL_MODULE_MAKEFILE_DEP) $(JACK)
 
 ifeq ($(LOCAL_IS_STATIC_JAVA_LIBRARY),true)
 $(full_classes_jack): $(jack_all_deps)
diff --git a/core/java_common.mk b/core/java_common.mk
index 6d5c2dd..e3d2853 100644
--- a/core/java_common.mk
+++ b/core/java_common.mk
@@ -259,7 +259,6 @@
         JAVA_LIBRARIES,$(lib),$(LOCAL_IS_HOST_MODULE),COMMON)/classes.jack)
 
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_STATIC_JACK_LIBRARIES := $(full_static_jack_libs)
-$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_VM_ARGS := $(LOCAL_JACK_VM_ARGS)
 $(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_JACK_EXTRA_ARGS := $(LOCAL_JACK_EXTRA_ARGS)
 
 ifndef LOCAL_IS_HOST_MODULE
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index 034b5ec..505bd45 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -313,7 +313,7 @@
 ifeq ($(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
 $(intermediates.COMMON)/classes.jack : PRIVATE_JILL_FLAGS:=$(LOCAL_JILL_FLAGS)
 $(intermediates.COMMON)/classes.jack : $(my_src_jar) $(LOCAL_MODULE_MAKEFILE_DEP) \
-        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JILL_JAR) $(JACK_JAR) $(JACK_LAUNCHER_JAR)
+        $(LOCAL_ADDITIONAL_DEPENDENCIES) $(JILL_JAR) $(JACK)
 	$(transform-jar-to-jack)
 
 endif # JAVA_LIBRARIES