diff --git a/Changes.md b/Changes.md
index 461de97..0b5db4d 100644
--- a/Changes.md
+++ b/Changes.md
@@ -1,5 +1,17 @@
 # Build System Changes for Android.mk Writers
 
+# `BOARD_HAL_STATIC_LIBRARIES` and `LOCAL_HAL_STATIC_LIBRARIES` are obsolete {#BOARD_HAL_STATIC_LIBRARIES}
+
+Define proper HIDL / Stable AIDL HAL instead.
+
+* For libhealthd, use health HAL. See instructions for implementing
+  health HAL:
+
+  * [hardware/interfaces/health/2.1/README.md] for health 2.1 HAL (recommended)
+  * [hardware/interfaces/health/1.0/README.md] for health 1.0 HAL
+
+* For libdumpstate, use at least Dumpstate HAL 1.0.
+
 ## PRODUCT_STATIC_BOOT_CONTROL_HAL is obsolete {#PRODUCT_STATIC_BOOT_CONTROL_HAL}
 
 `PRODUCT_STATIC_BOOT_CONTROL_HAL` was the workaround to allow sideloading with
@@ -480,3 +492,5 @@
 [external/fonttools/Lib/fontTools/Android.bp]: https://android.googlesource.com/platform/external/fonttools/+/master/Lib/fontTools/Android.bp
 [frameworks/base/Android.bp]: https://android.googlesource.com/platform/frameworks/base/+/master/Android.bp
 [frameworks/base/data/fonts/Android.mk]: https://android.googlesource.com/platform/frameworks/base/+/master/data/fonts/Android.mk
+[hardware/interfaces/health/1.0/README.md]: https://android.googlesource.com/platform/hardware/interfaces/+/master/health/1.0/README.md
+[hardware/interfaces/health/2.1/README.md]: https://android.googlesource.com/platform/hardware/interfaces/+/master/health/2.1/README.md
diff --git a/core/binary.mk b/core/binary.mk
index e4805cd..568766f 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -435,15 +435,6 @@
 
 include $(BUILD_SYSTEM)/cxx_stl_setup.mk
 
-# Add static HAL libraries
-ifdef LOCAL_HAL_STATIC_LIBRARIES
-$(foreach lib, $(LOCAL_HAL_STATIC_LIBRARIES), \
-    $(eval b_lib := $(filter $(lib).%,$(BOARD_HAL_STATIC_LIBRARIES)))\
-    $(if $(b_lib), $(eval my_static_libraries += $(b_lib)),\
-                   $(eval my_static_libraries += $(lib).default)))
-b_lib :=
-endif
-
 ifneq ($(strip $(CUSTOM_$(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)LINKER)),)
   my_linker := $(CUSTOM_$(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)LINKER)
 else
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 9ff978b..6c3b249 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -112,7 +112,6 @@
 # Group static libraries with "-Wl,--start-group" and "-Wl,--end-group" when linking.
 LOCAL_GROUP_STATIC_LIBRARIES:=
 LOCAL_GTEST:=true
-LOCAL_HAL_STATIC_LIBRARIES:=
 LOCAL_HEADER_LIBRARIES:=
 LOCAL_HOST_PREFIX:=
 LOCAL_HOST_REQUIRED_MODULES:=
diff --git a/core/config.mk b/core/config.mk
index 9ab3fff..4cc78b8 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -120,6 +120,8 @@
 )
 $(KATI_obsolete_var PRODUCT_IOT)
 $(KATI_obsolete_var MD5SUM)
+$(KATI_obsolete_var BOARD_HAL_STATIC_LIBRARIES, See $(CHANGES_URL)#BOARD_HAL_STATIC_LIBRARIES)
+$(KATI_obsolete_var LOCAL_HAL_STATIC_LIBRARIES, See $(CHANGES_URL)#BOARD_HAL_STATIC_LIBRARIES)
 
 # Used to force goals to build.  Only use for conditionally defined goals.
 .PHONY: FORCE