diff --git a/Changes.md b/Changes.md
index 05f54b8..53ff007 100644
--- a/Changes.md
+++ b/Changes.md
@@ -1,6 +1,6 @@
 # Build System Changes for Android.mk Writers
 
-## Deprecating envsetup.sh variables in Makefiles
+## Deprecating / obsoleting envsetup.sh variables in Makefiles
 
 It is not required to source envsetup.sh before running a build. Many scripts,
 including a majority of our automated build systems, do not do so. Make will
@@ -14,8 +14,9 @@
 
 To fix this, we're marking the variables that are set in envsetup.sh as
 deprecated in the makefiles. This will trigger a warning every time one is read
-(or written) inside Kati. Once all the warnings have been removed, we'll switch
-this to obsolete, and any references will become errors.
+(or written) inside Kati. Once all the warnings have been removed for a
+particular variable, we'll switch it to obsolete, and any references will become
+errors.
 
 ### envsetup.sh variables with make equivalents
 
diff --git a/core/config.mk b/core/config.mk
index c3cd5a7..0cd92ff 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -61,14 +61,14 @@
 # Mark variables deprecated/obsolete
 CHANGES_URL := https://android.googlesource.com/platform/build/+/master/Changes.md
 $(KATI_deprecated_var PATH,Do not use PATH directly. See $(CHANGES_URL)#PATH)
-$(KATI_deprecated_var PYTHONPATH,Do not use PYTHONPATH directly. See $(CHANGES_URL)#PYTHONPATH)
-$(KATI_deprecated_var OUT,Use OUT_DIR instead. See $(CHANGES_URL)#OUT)
-$(KATI_deprecated_var ANDROID_HOST_OUT,Use HOST_OUT instead. See $(CHANGES_URL)#ANDROID_HOST_OUT)
+$(KATI_obsolete_var PYTHONPATH,Do not use PYTHONPATH directly. See $(CHANGES_URL)#PYTHONPATH)
+$(KATI_obsolete_var OUT,Use OUT_DIR instead. See $(CHANGES_URL)#OUT)
+$(KATI_obsolete_var ANDROID_HOST_OUT,Use HOST_OUT instead. See $(CHANGES_URL)#ANDROID_HOST_OUT)
 $(KATI_deprecated_var ANDROID_PRODUCT_OUT,Use PRODUCT_OUT instead. See $(CHANGES_URL)#ANDROID_PRODUCT_OUT)
-$(KATI_deprecated_var ANDROID_HOST_OUT_TESTCASES,Use HOST_OUT_TESTCASES instead. See $(CHANGES_URL)#ANDROID_HOST_OUT_TESTCASES)
-$(KATI_deprecated_var ANDROID_TARGET_OUT_TESTCASES,Use TARGET_OUT_TESTCASES instead. See $(CHANGES_URL)#ANDROID_TARGET_OUT_TESTCASES)
+$(KATI_obsolete_var ANDROID_HOST_OUT_TESTCASES,Use HOST_OUT_TESTCASES instead. See $(CHANGES_URL)#ANDROID_HOST_OUT_TESTCASES)
+$(KATI_obsolete_var ANDROID_TARGET_OUT_TESTCASES,Use TARGET_OUT_TESTCASES instead. See $(CHANGES_URL)#ANDROID_TARGET_OUT_TESTCASES)
 $(KATI_deprecated_var ANDROID_BUILD_TOP,Use '.' instead. See $(CHANGES_URL)#ANDROID_BUILD_TOP)
-$(KATI_deprecated_var \
+$(KATI_obsolete_var \
   ANDROID_TOOLCHAIN \
   ANDROID_TOOLCHAIN_2ND_ARCH \
   ANDROID_DEV_SCRIPTS \