diff --git a/core/clang/config.mk b/core/clang/config.mk
index 60e0641..b4fe708 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -1,14 +1,7 @@
 ## Clang configurations.
 
-LLVM_PREBUILTS_PATH := $(LLVM_PREBUILTS_BASE)/$(BUILD_OS)-x86/$(LLVM_PREBUILTS_VERSION)/bin
 LLVM_RTLIB_PATH := $(LLVM_PREBUILTS_PATH)/../lib64/clang/$(LLVM_RELEASE_VERSION)/lib/linux/
 
-# These will come from Soong, drop the environment versions
-unexport CLANG
-unexport CLANG_CXX
-unexport CCC_CC
-unexport CCC_CXX
-
 CLANG_TBLGEN := $(BUILD_OUT_EXECUTABLES)/clang-tblgen$(BUILD_EXECUTABLE_SUFFIX)
 LLVM_TBLGEN := $(BUILD_OUT_EXECUTABLES)/llvm-tblgen$(BUILD_EXECUTABLE_SUFFIX)
 
diff --git a/core/clang/versions.mk b/core/clang/versions.mk
index 03341d9..d9c8aab 100644
--- a/core/clang/versions.mk
+++ b/core/clang/versions.mk
@@ -1,5 +1,3 @@
 ## Clang/LLVM release versions.
 
-LLVM_RELEASE_VERSION := 3.8
 LLVM_PREBUILTS_VERSION ?= clang-3289846
-LLVM_PREBUILTS_BASE ?= prebuilts/clang/host
diff --git a/core/config.mk b/core/config.mk
index 9a35b2f..2f43f46 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -716,8 +716,11 @@
 $(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES := default
 endif
 
-# define clang/llvm tools and global flags
-include $(BUILD_SYSTEM)/clang/config.mk
+# These will come from Soong, drop the environment versions
+unexport CLANG
+unexport CLANG_CXX
+unexport CCC_CC
+unexport CCC_CXX
 
 # ###############################################################
 # Collect a list of the SDK versions that we could compile against
diff --git a/core/main.mk b/core/main.mk
index 5a3042a..77b213c 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -50,6 +50,8 @@
 
 include $(SOONG_MAKEVARS_MK)
 
+include $(BUILD_SYSTEM)/clang/config.mk
+
 # Write the build number to a file so it can be read back in
 # without changing the command line every time.  Avoids rebuilds
 # when using ninja.