diff --git a/cc/toolchains/impl/legacy_converter.bzl b/cc/toolchains/impl/legacy_converter.bzl
index 8f8a460..5e8a144 100644
--- a/cc/toolchains/impl/legacy_converter.bzl
+++ b/cc/toolchains/impl/legacy_converter.bzl
@@ -204,7 +204,7 @@
     ))
 
     cxx_builtin_include_directories = [
-        d.path
+        "%workspace%/" + d.path
         for d in toolchain.allowlist_include_directories.to_list()
     ]
     cxx_builtin_include_directories += toolchain.allowlist_absolute_include_directories.to_list()