Merge "Reapply "Use partition intead of "root" to assemble filesystem artifacts"" into main
diff --git a/rust/proc_macro.go b/rust/proc_macro.go
index 1ff6637..28ed68b 100644
--- a/rust/proc_macro.go
+++ b/rust/proc_macro.go
@@ -67,6 +67,7 @@
 func (procMacro *procMacroDecorator) compilerFlags(ctx ModuleContext, flags Flags) Flags {
 	flags = procMacro.baseCompiler.compilerFlags(ctx, flags)
 	flags.RustFlags = append(flags.RustFlags, "--extern proc_macro")
+	flags.RustFlags = append(flags.RustFlags, "-C metadata="+ctx.ModuleName())
 	return flags
 }