don't try to build recovery patch in generic build
diff --git a/core/Makefile b/core/Makefile
index 8062542..99b23b0 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -647,6 +647,7 @@
# we can see how big it's going to be, and include that in the system
# image size check calculation.
ifneq ($(TARGET_PRODUCT),sdk)
+ifneq ($(TARGET_PRODUCT),generic)
intermediates := $(call intermediates-dir-for,PACKAGING,recovery_patch)
RECOVERY_FROM_BOOT_PATCH := $(intermediates)/recovery_from_boot.p
$(RECOVERY_FROM_BOOT_PATCH): $(INSTALLED_RECOVERYIMAGE_TARGET) \
@@ -656,9 +657,8 @@
@echo "Construct recovery from boot"
mkdir -p $(dir $@)
PATH=$(HOST_OUT_EXECUTABLES):$$PATH $(HOST_OUT_EXECUTABLES)/imgdiff $(INSTALLED_BOOTIMAGE_TARGET) $(INSTALLED_RECOVERYIMAGE_TARGET) $@
-else # TARGET_PRODUCT == sdk
-RECOVERY_FROM_BOOT_PATCH :=
-endif
+endif # TARGET_PRODUCT != generic
+endif # TARGET_PRODUCT != sdk
$(INSTALLED_SYSTEMIMAGE): $(BUILT_SYSTEMIMAGE) $(RECOVERY_FROM_BOOT_PATCH) | $(ACP)
@echo "Install system fs image: $@"