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", "")