diff --git a/CleanSpec.mk b/CleanSpec.mk
index ee85995..17fd5d6 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -217,6 +217,9 @@
 # Add ro.product.cpu.abilist{32,64} to build.prop.
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# Adding dalvik.vm.dex2oat-flags to eng builds
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
diff --git a/core/main.mk b/core/main.mk
index 5175bef..a6c946d 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -393,6 +393,10 @@
           $(call collapse-pairs, $(ADDITIONAL_BUILD_PROPERTIES))) \
           ro.setupwizard.mode=OPTIONAL
 endif
+# Don't even verify the image on eng builds to speed startup
+ADDITIONAL_BUILD_PROPERTIES += dalvik.vm.image-dex2oat-flags=--compiler-filter=verify-none
+# Don't compile apps on eng builds to speed startup
+ADDITIONAL_BUILD_PROPERTIES += dalvik.vm.dex2oat-flags=--compiler-filter=interpret-only
 endif
 
 ## sdk ##