From 04e5a077d0674710587ad5112b518c4c5916cc86 Mon Sep 17 00:00:00 2001
From: Tadashi Saito <tad.a.digger@gmail.com>
Date: Fri, 20 Sep 2024 23:23:24 +0900
Subject: [PATCH] Add more.

---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/README.md b/README.md
index 6de599d..b583c59 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,14 @@ printf("content: %d\n", i);
 ```
 Then it prints `42`. Happy ending. 🤔🤔
 
+## Development
+
+We use [Criterion](https://github.com/Snaipe/Criterion) for tests, so
+you'll need to install that before `make test`.
+
+Dear Debian/Ubuntu user: You can install via
+`apt install [libcriterion-dev](https://packages.debian.org/bookworm/libcriterion-dev)`.
+
 ## License
 
 [CC0](./CC0.md).