diff --git a/.github/scripts/release.js b/.github/scripts/release.js
index 287f80b..589c876 100644
--- a/.github/scripts/release.js
+++ b/.github/scripts/release.js
@@ -9,12 +9,12 @@ module.exports = async function ({ github, context, glob }) {
     ...context.repo,
     release_id: context.payload.release.id,
   };
-  let body = "## Megabit OS\n";
-  const globber = await glob.create("megabit-armhf.*.gz");
+  let body = "## Yama\n";
+  const globber = await glob.create("yama-armhf.*.gz");
   for await (const file of globber.globGenerator()) {
     const name = path
       .basename(file)
-      .replace(/^megabit-armhf[.]/, `megabit-${version}-armhf.`);
+      .replace(/^yama-armhf[.]/, `yama-${version}-armhf.`);
     const data = await fs.readFile(file);
     await github.repos.uploadReleaseAsset({ ...target, name, data });
     const hash = crypto.createHash("sha256").update(data).digest("hex");
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7ddaa85..f8cd43b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,8 +14,8 @@ jobs:
       - run: sudo bin/img-gen
       - uses: actions/upload-artifact@v2
         with:
-          name: megabit-armhf
-          path: megabit-armhf.*
+          name: yama-armhf
+          path: yama-armhf.*
   release:
     if: github.event.release.prerelease
     needs: main
@@ -23,7 +23,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: actions/download-artifact@v2
-        with: { name: megabit-armhf }
+        with: { name: yama-armhf }
       - uses: actions/github-script@v4
         with:
           script: |
diff --git a/.gitignore b/.gitignore
index 3b57b86..96bf745 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 /apkovl/
 /cache/
 /dist/
-/megabit-armhf.tar.gz
-/megabit-armhf.img.gz
+/yama-armhf.tar.gz
+/yama-armhf.img.gz
diff --git a/README.md b/README.md
index 58df437..072cbeb 100644
--- a/README.md
+++ b/README.md
@@ -1,39 +1,10 @@
-# Megabit OS
+# Yama
 
-[Megabit](https://github.com/kou029w/megabit) をすぐに試せる実行環境とそれをビルドするためのツール群
+Raspberry Pi Zero 向け OS のビルドするためのツール群
 
-## 使い方
-
-1. [Releases](https://github.com/kou029w/megabit-os/releases) から OS イメージをダウンロード
-2. イメージを microSD カードに書き込み
-3. Raspberry Pi Zero とパソコンを USB で接続し、2 分待つ
-4. 自動的に認識される USB マスストレージのルートに index.js を作成することで自動的に実行
-   - 注意: index.js 以外の node_modules/ などは無視されます
-
-## サンプルコード
-
-index.js
-
-```js
-const { gpio } = require("megabit");
-const sleep = require("util").promisify(setTimeout);
-
-async function blink() {
-  for (;;) {
-    await gpio(26).write(1);
-    await sleep(1000);
-    await gpio(26).write(0);
-    await sleep(1000);
-  }
-}
-
-blink();
-```
-
-## 詳細
-
-- Alpine Linux v3.14 ベース (armhf)
-- Node.js v14.17.6
+- Alpine Linux ベース (armhf)
+- WiFi 対応
+- その他オレオレカスタマイズ
 
 ## ビルド
 
@@ -49,7 +20,7 @@ bin/img-gen
 - Docker
 - Docker Compose
 - qemu-user-static
-- awk, bash, curl, fallocate, grep, gzip, gzip, losetup, mkfs.fat, parted, ruby, ssh-keygen, tar, xargs
+- awk, bash, curl, fallocate, grep, gzip, losetup, mkfs.fat, parted, ruby, ssh-keygen, tar, xargs
 
 ### WiFi の設定
 
diff --git a/bin/build b/bin/build
index 5c12b49..1f1be1e 100755
--- a/bin/build
+++ b/bin/build
@@ -15,4 +15,4 @@ cp -a usercfg.txt cache -t dist
 gzip -cdk overlay.img.gz > dist/overlay.img
 docker-compose run --rm builder
 tar czf dist/localhost.apkovl.tar.gz --owner=0 --group=0 -C apkovl .
-tar czf megabit-armhf.tar.gz --owner=0 --group=0 -C dist .
+tar czf yama-armhf.tar.gz --owner=0 --group=0 -C dist .
diff --git a/bin/img-gen b/bin/img-gen
index abfdb29..9f249e9 100755
--- a/bin/img-gen
+++ b/bin/img-gen
@@ -4,9 +4,9 @@
 # Required: gzip awk fallocate parted xargs losetup mkfs.fat tar
 cd -- "$(dirname -- "$0")/.."
 set -eux
-size="$(gzip -l megabit-armhf.tar.gz | awk 'END{printf"%.f",$2*1.02}')"
-fallocate -l "${size}" megabit-armhf.img
-xargs -l parted -s megabit-armhf.img <<EOF
+size="$(gzip -l yama-armhf.tar.gz | awk 'END{printf"%.f",$2*1.02}')"
+fallocate -l "${size}" yama-armhf.img
+xargs -l parted -s yama-armhf.img <<EOF
 mklabel msdos
 mkpart primary fat32 0 100%
 set 1 boot on
@@ -14,12 +14,12 @@ EOF
 dev="$(losetup -f)"
 finally="losetup -d '${dev}'"
 trap 'sh -c "${finally}"' EXIT
-losetup -P "${dev}" megabit-armhf.img
+losetup -P "${dev}" yama-armhf.img
 part="${dev}p1"
 mkfs.fat "${part}"
 tmp="$(mktemp -d)"
 finally="rmdir '${tmp}'; ${finally}"
 mount "${part}" "${tmp}"
 finally="umount '${tmp}'; ${finally}"
-tar xf megabit-armhf.tar.gz -C "${tmp}"
-finally="${finally}; gzip -f megabit-armhf.img"
+tar xf yama-armhf.tar.gz -C "${tmp}"
+finally="${finally}; gzip -f yama-armhf.img"