From d6379a5ec0761759a02c39f5e47f0dec79239972 Mon Sep 17 00:00:00 2001
From: unlsycn <unlsycn@unlsycn.com>
Date: Sat, 28 Sep 2024 12:16:25 +0000
Subject: [PATCH] [doc] update readme

---
 readme.md | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/readme.md b/readme.md
index af62ab8..2719bc1 100644
--- a/readme.md
+++ b/readme.md
@@ -124,6 +124,29 @@ To format the Scala code, developers can run:
 nix develop -c bash -c 'mill -i gcd.reformat && mill -i elaborator.reformat'
 ```
 
+### Bump dependencies
+
+To bump nixpkgs, run:
+
+```bash
+nix flake update 
+```
+
+To bump Chisel and other dependencies fetched by nvfetcher, run:
+
+```bash
+cd nix/pkgs/dependencies
+nix run '.#nvfetcher'
+```
+
+To bump mill dependencies, run:
+
+```bash
+nix build '.#gcd.gcd-compiled.millDeps' --rebuild
+```
+
+and Then update `millDepsHash` in `nix/gcd/gcd.nix`
+
 ### Use the fetchMillDeps function
 
 Fetch project dependencies for later offline usage.