diff --git a/INSTALL.md b/INSTALL.md
index 2f42f9be4..2b9ef9a55 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -6,8 +6,8 @@
 
 ### Prerequisites
 
-Install **Xcode 12.2** or above from App Store, to build Squirrel as a Universal
-app. The minimum required version is *Xcode 10* to build for `x86_64` only.
+Install **Xcode 14.0** or above from App Store, to build Squirrel as a Universal
+app.
 
 Install **cmake**.
 
@@ -39,7 +39,7 @@ Optionally, checkout Rime plugins (a list of GitHub repo slugs):
 bash librime/install-plugins.sh rime/librime-sample # ...
 ```
 
-Popular plugins include [librime-lua](https://github.com/hchunhui/librime-lua) and [librime-octagram](https://github.com/lotem/librime-octagram)
+Popular plugins include [librime-lua](https://github.com/hchunhui/librime-lua), [librime-octagram](https://github.com/lotem/librime-octagram) and [librime-predict](https://github.com/rime/librime-predict)
 
 ### Shortcut: get the latest librime release
 
@@ -100,25 +100,33 @@ port install boost -no_static
 git submodule update --init --recursive
 ```
 
+* There are a few environmental variables that you can define. Here's a list and possible values they may take:
+
+``` sh
+export BOOST_ROOT="path_to_boost" # required
+export DEV_ID="Your Apple ID name" # include this to codesign, optional
+export BUILD_UNIVERSAL=1 # set to build universal binary
+export PLUM_TAG=":preset” # or ":extra", optional, build with a set of plum formulae
+export ARCHS='arm64 x86_64' # optional, if not defined, only active arch is used
+export MACOSX_DEPLOYMENT_TARGET='13.0' # optional, lower version than 13.0 is not tested and may not work properly
+```
+
 * With all dependencies ready, build `Squirrel.app`:
 
 ``` sh
 make
 ```
 
-To build only for the native architecture, and/or specify the lowest supported macOS version, pass variable `ARCHS` and/or `MACOSX_DEPLOYMENT_TARGET` to `make`:
+* You can either define the environment variables in your shell/terminal, or append them as arguments to the make command. For example:
 
 ``` sh
 # for Universal macOS App
-make ARCHS='arm64 x86_64'
-
-# for ARM macOS App
-make ARCHS='arm64'
+make ARCHS='arm64 x86_64' BUILD_UNIVERSAL=1
 ```
 
 ## Install it on your Mac
 
-## Make Package
+### Make Package
 
 Just add `package` after `make`
 
@@ -126,7 +134,7 @@ Just add `package` after `make`
 make package ARCHS='arm64'
 ```
 
-Define or echo `DEV_ID` to automatically handle code signing and [notarization](https://developer.apple.com/documentation/security/notarizing_macos_software_before_distribution) (Apple Developer ID needed)
+Define `DEV_ID` to automatically handle code signing and [notarization](https://developer.apple.com/documentation/security/notarizing_macos_software_before_distribution) (Apple Developer ID needed)
 
 To make this work, you need a `Developer ID Installer: (your name/org)` and set your name/org as `DEV_ID` env variable. 
 
@@ -138,7 +146,7 @@ xcrun notarytool store-credentials 'your name/org'
 
 You **don't** need to define `DEV_ID` if you don't intend to distribute the package.
 
-## Directly Install
+### Directly Install
 
 **You might need to precede with sudo, and without a logout, the App might not work properly. Direct install is not very recommended.**
 
@@ -147,9 +155,24 @@ Once built, you can install and try it live on your Mac computer:
 ``` sh
 # Squirrel as a Universal app
 make install
+```
+
+## Clean Up Artifacts
+
+After installation or after a failed attempt, you may want to start over. Before you do so, **make sure you have cleaned up artifacts from previous build.**
 
-# for Intel-based Mac only
-make ARCHS='x86_64' install
+To clean **Squirrel** artifacts, without touching dependencies, run:
+
+``` sh
+make clean
 ```
 
-That's it, a verbal journal. Thanks for riming with Squirrel.
+To clean up **dependencies**, including librime, librime plugins, plum and sparkle, run:
+
+``` sh
+make clean-deps
+```
+
+If you want to clean both, do both.
+
+That's it, a verbal journal. Thanks for riming with Squirrel.
\ No newline at end of file
diff --git a/Makefile b/Makefile
index eb49db82b..d2c1010ce 100644
--- a/Makefile
+++ b/Makefile
@@ -80,7 +80,7 @@ copy-plum-data:
 copy-opencc-data:
 	mkdir -p data/opencc
 	cp $(OPENCC_DATA_OUTPUT) data/opencc/
-	cp $(PLUM_OPENCC_OUTPUT) data/opencc/ || true
+	cp $(PLUM_OPENCC_OUTPUT) data/opencc/ > /dev/null 2>&1 || true
 
 deps: librime data
 
@@ -129,7 +129,7 @@ clean-sparkle:
 	rm -rf Frameworks/* > /dev/null 2>&1 || true
 	rm -rf Sparkle/build > /dev/null 2>&1 || true
 
-.PHONY: package archive sign-archive
+.PHONY: package archive
 
 package: release
 ifdef DEV_ID
@@ -147,10 +147,6 @@ endif
 archive: package
 	bash package/make_archive
 
-sign-archive:
-	[ -n "${checksum}" ] || (echo >&2 'ERROR: $$checksum not specified.'; false)
-	sign_key=sign/dsa_priv.pem bash package/make_archive
-
 DSTROOT = /Library/Input Methods
 SQUIRREL_APP_ROOT = $(DSTROOT)/Squirrel.app
 
@@ -183,4 +179,5 @@ clean:
 clean-deps:
 	$(MAKE) -C plum clean
 	$(MAKE) -C librime clean
+	rm -rf librime/dist > /dev/null 2>&1 || true
 	$(MAKE) clean-sparkle
diff --git a/README.md b/README.md
index ee6ad553c..7dfcdaaf1 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 【鼠鬚管】輸入法
 ===
 [![Download](https://img.shields.io/github/v/release/rime/squirrel)](https://github.com/rime/squirrel/releases/latest)
-[![Build Status](https://travis-ci.org/rime/squirrel.svg)](https://travis-ci.org/rime/squirrel)
+[![Build Status](https://github.com/rime/squirrel/actions/workflows/commit-ci.yml/badge.svg)](https://github.com/rime/squirrel/actions/workflows)
 [![GitHub Tag](https://img.shields.io/github/tag/rime/squirrel.svg)](https://github.com/rime/squirrel)
 
 式恕堂 版權所無
@@ -22,7 +22,7 @@
 
 您可能還需要 Rime 用於其他操作系統的發行版：
 
-  * ibus-rime 及 fcitx-rime 用於 Linux
+  * 【中州韻】（ibus-rime、fcitx-rime）用於 Linux
   * 【小狼毫】用於 Windows
 
 安裝輸入法
@@ -99,8 +99,7 @@
 問題與反饋
 ---
 
-發現程序有 BUG，或建議，或感想，請反饋到
-https://github.com/rime/home/issues
+發現程序有 BUG，或建議，或感想，請反饋到 [Rime 代碼之家討論區](https://github.com/rime/home/discussions)
 
 聯繫方式
 ---