diff --git a/cc/config/global.go b/cc/config/global.go
index e254a1c..1ce1cce 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -145,6 +145,14 @@
 	})
 	pctx.StaticVariable("ClangAsanLibDir", "${ClangPath}/lib64/clang/${ClangShortVersion}/lib/linux")
 
+	// These are tied to the version of LLVM directly in external/llvm, so they might trail the host prebuilts
+	// being used for the rest of the build process.
+	pctx.SourcePathVariable("RSClangBase", "prebuilts/clang/host")
+	pctx.SourcePathVariable("RSClangVersion", "clang-3289846")
+	pctx.SourcePathVariable("RSReleaseVersion", "3.8")
+	pctx.StaticVariable("RSLLVMPrebuiltsPath", "${RSClangBase}/${HostPrebuiltTag}/${RSClangVersion}/bin")
+	pctx.StaticVariable("RSIncludePath", "${RSLLVMPrebuiltsPath}/../lib64/clang/${RSReleaseVersion}/include")
+
 	pctx.VariableFunc("CcWrapper", func(config interface{}) (string, error) {
 		if override := config.(android.Config).Getenv("CC_WRAPPER"); override != "" {
 			return override + " ", nil
diff --git a/cc/makevars.go b/cc/makevars.go
index 30d83e8..06b57c9 100644
--- a/cc/makevars.go
+++ b/cc/makevars.go
@@ -40,6 +40,13 @@
 	ctx.Strict("PATH_TO_CLANG_TIDY", "${config.ClangBin}/clang-tidy")
 	ctx.StrictSorted("CLANG_CONFIG_UNKNOWN_CFLAGS", strings.Join(config.ClangUnknownCflags, " "))
 
+	ctx.Strict("RS_LLVM_PREBUILTS_VERSION", "${config.RSClangVersion}")
+	ctx.Strict("RS_LLVM_PREBUILTS_BASE", "${config.RSClangBase}")
+	ctx.Strict("RS_LLVM_PREBUILTS_PATH", "${config.RSLLVMPrebuiltsPath}")
+	ctx.Strict("RS_CLANG", "${config.RSLLVMPrebuiltsPath}/clang")
+	ctx.Strict("RS_LLVM_AS", "${config.RSLLVMPrebuiltsPath}/llvm-as")
+	ctx.Strict("RS_LLVM_LINK", "${config.RSLLVMPrebuiltsPath}/llvm-link")
+
 	ctx.Strict("GLOBAL_CFLAGS_NO_OVERRIDE", "${config.NoOverrideGlobalCflags}")
 	ctx.Strict("GLOBAL_CLANG_CFLAGS_NO_OVERRIDE", "${config.ClangExtraNoOverrideCflags}")
 	ctx.Strict("GLOBAL_CPPFLAGS_NO_OVERRIDE", "")