diff --git a/Deprecation.md b/Deprecation.md
index 5e2649270..2f936e354 100644
--- a/Deprecation.md
+++ b/Deprecation.md
@@ -16,13 +16,13 @@ have any problems converting, please contact us via:
 | -------------------------------- | --------- |
 | `BUILD_AUX_EXECUTABLE`           | Error     |
 | `BUILD_AUX_STATIC_LIBRARY`       | Error     |
-| `BUILD_COPY_HEADERS`             | Warning   |
-| `BUILD_HOST_EXECUTABLE`          | Warning   |
+| `BUILD_COPY_HEADERS`             | Error     |
+| `BUILD_HOST_EXECUTABLE`          | Error     |
 | `BUILD_HOST_FUZZ_TEST`           | Error     |
 | `BUILD_HOST_NATIVE_TEST`         | Error     |
-| `BUILD_HOST_SHARED_LIBRARY`      | Warning   |
+| `BUILD_HOST_SHARED_LIBRARY`      | Error     |
 | `BUILD_HOST_SHARED_TEST_LIBRARY` | Error     |
-| `BUILD_HOST_STATIC_LIBRARY`      | Warning   |
+| `BUILD_HOST_STATIC_LIBRARY`      | Error     |
 | `BUILD_HOST_STATIC_TEST_LIBRARY` | Error     |
 | `BUILD_HOST_TEST_CONFIG`         | Error     |
 | `BUILD_NATIVE_BENCHMARK`         | Error     |
diff --git a/core/board_config.mk b/core/board_config.mk
index a7879583b..8ff16e259 100644
--- a/core/board_config.mk
+++ b/core/board_config.mk
@@ -624,16 +624,16 @@ endif
 ###########################################
 # Handle BUILD_BROKEN_USES_BUILD_*
 
-$(foreach m,$(filter-out BUILD_COPY_HEADERS,$(DEFAULT_WARNING_BUILD_MODULE_TYPES)),\
+$(foreach m,$(DEFAULT_WARNING_BUILD_MODULE_TYPES),\
   $(if $(filter false,$(BUILD_BROKEN_USES_$(m))),\
     $(KATI_obsolete_var $(m),Please convert to Soong),\
     $(KATI_deprecated_var $(m),Please convert to Soong)))
 
-$(if $(filter false,$(BUILD_BROKEN_USES_BUILD_COPY_HEADERS)),\
-  $(KATI_obsolete_var BUILD_COPY_HEADERS,See $(CHANGES_URL)#copy_headers),\
-  $(KATI_deprecated_var BUILD_COPY_HEADERS,See $(CHANGES_URL)#copy_headers))
+$(if $(filter true,$(BUILD_BROKEN_USES_BUILD_COPY_HEADERS)),\
+  $(KATI_deprecated_var BUILD_COPY_HEADERS,See $(CHANGES_URL)#copy_headers),\
+  $(KATI_obsolete_var BUILD_COPY_HEADERS,See $(CHANGES_URL)#copy_headers))
 
-$(foreach m,$(DEFAULT_ERROR_BUILD_MODULE_TYPES),\
+$(foreach m,$(filter-out BUILD_COPY_HEADERS,$(DEFAULT_ERROR_BUILD_MODULE_TYPES)),\
   $(if $(filter true,$(BUILD_BROKEN_USES_$(m))),\
     $(KATI_deprecated_var $(m),Please convert to Soong),\
     $(KATI_obsolete_var $(m),Please convert to Soong)))
diff --git a/core/deprecation.mk b/core/deprecation.mk
index cc620a32d..19bd4cfb9 100644
--- a/core/deprecation.mk
+++ b/core/deprecation.mk
@@ -24,10 +24,6 @@ AVAILABLE_BUILD_MODULE_TYPES :=$= \
 # relevant BUILD_BROKEN_USES_BUILD_* variables, then these would move to
 # DEFAULT_ERROR_BUILD_MODULE_TYPES.
 DEFAULT_WARNING_BUILD_MODULE_TYPES :=$= \
-  BUILD_COPY_HEADERS \
-  BUILD_HOST_EXECUTABLE \
-  BUILD_HOST_SHARED_LIBRARY \
-  BUILD_HOST_STATIC_LIBRARY \
 
 # These are BUILD_* variables that are errors to reference, but you can set
 # BUILD_BROKEN_USES_BUILD_* in your BoardConfig.mk in order to turn them back
@@ -35,8 +31,12 @@ DEFAULT_WARNING_BUILD_MODULE_TYPES :=$= \
 DEFAULT_ERROR_BUILD_MODULE_TYPES :=$= \
   BUILD_AUX_EXECUTABLE \
   BUILD_AUX_STATIC_LIBRARY \
+  BUILD_COPY_HEADERS \
+  BUILD_HOST_EXECUTABLE \
   BUILD_HOST_FUZZ_TEST \
   BUILD_HOST_NATIVE_TEST \
+  BUILD_HOST_SHARED_LIBRARY \
+  BUILD_HOST_STATIC_LIBRARY \
   BUILD_HOST_STATIC_TEST_LIBRARY \
   BUILD_HOST_TEST_CONFIG \
   BUILD_NATIVE_BENCHMARK \
diff --git a/core/host_shared_library.mk b/core/host_shared_library.mk
index c22af97a2..fbe6442e2 100644
--- a/core/host_shared_library.mk
+++ b/core/host_shared_library.mk
@@ -38,6 +38,8 @@ my_module_arch_supported :=
 ## Copy headers to the install tree
 ###########################################################
 ifdef LOCAL_COPY_HEADERS
-$(call pretty-warning,LOCAL_COPY_HEADERS is deprecated. See $(CHANGES_URL)#copy_headers)
+$(if $(filter true,$(BUILD_BROKEN_USES_BUILD_COPY_HEADERS)),\
+  $(call pretty-warning,LOCAL_COPY_HEADERS is deprecated. See $(CHANGES_URL)#copy_headers),\
+  $(call pretty-error,LOCAL_COPY_HEADERS is obsolete. See $(CHANGES_URL)#copy_headers))
 include $(BUILD_SYSTEM)/copy_headers.mk
 endif
diff --git a/core/host_static_library.mk b/core/host_static_library.mk
index 3dbd14496..23d809c68 100644
--- a/core/host_static_library.mk
+++ b/core/host_static_library.mk
@@ -38,6 +38,8 @@ my_module_arch_supported :=
 ## Copy headers to the install tree
 ###########################################################
 ifdef LOCAL_COPY_HEADERS
-$(call pretty-warning,LOCAL_COPY_HEADERS is deprecated. See $(CHANGES_URL)#copy_headers)
+$(if $(filter true,$(BUILD_BROKEN_USES_BUILD_COPY_HEADERS)),\
+  $(call pretty-warning,LOCAL_COPY_HEADERS is deprecated. See $(CHANGES_URL)#copy_headers),\
+  $(call pretty-error,LOCAL_COPY_HEADERS is obsolete. See $(CHANGES_URL)#copy_headers))
 include $(BUILD_SYSTEM)/copy_headers.mk
 endif
diff --git a/core/shared_library.mk b/core/shared_library.mk
index ca17151c4..29d8276a0 100644
--- a/core/shared_library.mk
+++ b/core/shared_library.mk
@@ -57,6 +57,8 @@ my_module_arch_supported :=
 ## Copy headers to the install tree
 ###########################################################
 ifdef LOCAL_COPY_HEADERS
-$(call pretty-warning,LOCAL_COPY_HEADERS is deprecated. See $(CHANGES_URL)#copy_headers)
+$(if $(filter true,$(BUILD_BROKEN_USES_BUILD_COPY_HEADERS)),\
+  $(call pretty-warning,LOCAL_COPY_HEADERS is deprecated. See $(CHANGES_URL)#copy_headers),\
+  $(call pretty-error,LOCAL_COPY_HEADERS is obsolete. See $(CHANGES_URL)#copy_headers))
 include $(BUILD_SYSTEM)/copy_headers.mk
 endif
diff --git a/core/static_library.mk b/core/static_library.mk
index 78908cf37..a45009269 100644
--- a/core/static_library.mk
+++ b/core/static_library.mk
@@ -42,6 +42,8 @@ my_module_arch_supported :=
 ## Copy headers to the install tree
 ###########################################################
 ifdef LOCAL_COPY_HEADERS
-$(call pretty-warning,LOCAL_COPY_HEADERS is deprecated. See $(CHANGES_URL)#copy_headers)
+$(if $(filter true,$(BUILD_BROKEN_USES_BUILD_COPY_HEADERS)),\
+  $(call pretty-warning,LOCAL_COPY_HEADERS is deprecated. See $(CHANGES_URL)#copy_headers),\
+  $(call pretty-error,LOCAL_COPY_HEADERS is obsolete. See $(CHANGES_URL)#copy_headers))
 include $(BUILD_SYSTEM)/copy_headers.mk
 endif