diff --git a/tools/aconfig/src/commands.rs b/tools/aconfig/src/commands.rs
index dc3e6bc..73d3357 100644
--- a/tools/aconfig/src/commands.rs
+++ b/tools/aconfig/src/commands.rs
@@ -16,13 +16,14 @@
 
 use anyhow::{Context, Result};
 use clap::ValueEnum;
+use serde::{Deserialize, Serialize};
 use std::fmt;
 use std::io::Read;
 
 use crate::aconfig::{Flag, Override};
 use crate::cache::Cache;
 
-#[derive(Clone)]
+#[derive(Serialize, Deserialize, Clone, Debug)]
 pub enum Source {
     #[allow(dead_code)] // only used in unit tests
     Memory,