From 4603047eb1a053cf566ab82444453b6f154b920a Mon Sep 17 00:00:00 2001
From: Tomoyuki Sahara <tsahara@iij.ad.jp>
Date: Fri, 7 Aug 2015 11:49:56 +0900
Subject: update installation procedure.

---
 README.md | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/README.md b/README.md
index e82458f06..91addce80 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,20 @@
 mruby-pack (pack / unpack)
 =========
 
-## install by mrbgems
-```bash
-git clone git://github.com/iij/mruby-pack.git
-cp -pr mruby-pack ${MRUBY_ROOT}/mrbgems/g/.
-echo mruby-pack >> ${MRUBY_ROOT}/mrbgems/GEMS.active
-cd ${MRUBY_ROOT}
-rake ENABLE_GEMS="true"
-./bin/mruby ${MRUBY_ROOT}/mrbgems/g/mruby-pack/example/sample.rb
+mruby-pack provides `Array#pack` and `String#unpack` for mruby.
+
+
+## Installation
+Add the line below into your `build_config.rb`:
+
 ```
+  conf.gem :github => 'iij/mruby-pack'
+```
+
+There is no dependency on other mrbgems.
+
 
-## supported template string
+## Supported template string
  - A : arbitrary binary string (space padded, count is width)
  - a : arbitrary binary string (null padded, count is width)
  - C : 8-bit unsigned (unsigned char)
-- 
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