diff --git a/core/config.mk b/core/config.mk
index b3a204b589..b3f3d36626 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -189,6 +189,12 @@ else
 JAVA_TMPDIR_ARG :=
 endif
 
+# ###############################################################
+# Broken build defaults
+# ###############################################################
+# Assume that all boards have duplicate rules right now.
+BUILD_BROKEN_DUP_RULES := true
+
 # ###############################################################
 # Include sub-configuration files
 # ###############################################################
diff --git a/target/board/generic/BoardConfig.mk b/target/board/generic/BoardConfig.mk
index 70c78a8d9f..9bf3c8bed5 100644
--- a/target/board/generic/BoardConfig.mk
+++ b/target/board/generic/BoardConfig.mk
@@ -69,4 +69,6 @@ BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
 TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
 
-BOARD_VNDK_VERSION := current
\ No newline at end of file
+BOARD_VNDK_VERSION := current
+
+BUILD_BROKEN_DUP_RULES := false
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index be8ea3918a..dbdec9055c 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -101,3 +101,5 @@ TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
 
 BOARD_VNDK_VERSION := current
+
+BUILD_BROKEN_DUP_RULES := false
diff --git a/target/board/generic_mips64/BoardConfig.mk b/target/board/generic_mips64/BoardConfig.mk
index 2052d7bc75..fa4c355346 100644
--- a/target/board/generic_mips64/BoardConfig.mk
+++ b/target/board/generic_mips64/BoardConfig.mk
@@ -91,3 +91,5 @@ DEX_PREOPT_DEFAULT := nostripping
 # Enable A/B update
 TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
+
+BUILD_BROKEN_DUP_RULES := false
diff --git a/target/board/generic_x86/BoardConfig.mk b/target/board/generic_x86/BoardConfig.mk
index f71e72b95d..3760cc4ec3 100644
--- a/target/board/generic_x86/BoardConfig.mk
+++ b/target/board/generic_x86/BoardConfig.mk
@@ -63,6 +63,8 @@ BOARD_SEPOLICY_DIRS += \
 
 BOARD_VNDK_VERSION := current
 
+BUILD_BROKEN_DUP_RULES := false
+
 # Enable A/B update
 TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
diff --git a/target/board/generic_x86_64/BoardConfig.mk b/target/board/generic_x86_64/BoardConfig.mk
index a9c5142049..ec7a51e5de 100755
--- a/target/board/generic_x86_64/BoardConfig.mk
+++ b/target/board/generic_x86_64/BoardConfig.mk
@@ -65,3 +65,5 @@ BOARD_VNDK_VERSION := current
 # Enable A/B update
 TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
+
+BUILD_BROKEN_DUP_RULES := false
diff --git a/target/board/treble_common.mk b/target/board/treble_common.mk
index a8c9bc52bd..187022edb3 100644
--- a/target/board/treble_common.mk
+++ b/target/board/treble_common.mk
@@ -58,3 +58,5 @@ ifeq ($(BOARD_AVB_ENABLE),true)
 $(error BOARD_AVB_ENABLE cannot be set for Treble GSI)
 endif
 BOARD_BUILD_DISABLED_VBMETAIMAGE := true
+
+BUILD_BROKEN_DUP_RULES := false