diff --git a/README.md b/README.md
index 4548b15..8d99794 100644
--- a/README.md
+++ b/README.md
@@ -15,10 +15,10 @@ simject is BSD-licensed. See `LICENSE` for more information.
 sudo xcode-select -s /Applications/Xcode.app
 git clone https://github.com/akemin-dayo/simject.git
 cd simject/
-make setup
+make all
 ```
 
-**Note:** During the process, you will be asked by `sudo` to enter your login password. Please note that it is normal for nothing to be displayed as you type your password.
+**Note:** During the process, you may be asked by `sudo` to enter your login password. Please note that it is normal for nothing to be displayed as you type your password.
 
 Now, we need to create a version of `CydiaSubstrate.framework` that has support for the `x86_64` (64-bit) and/or `i386` (32-bit) architectures.
 
diff --git a/installsubstrate.sh b/installsubstrate.sh
index f57ebe3..ecde674 100755
--- a/installsubstrate.sh
+++ b/installsubstrate.sh
@@ -1,4 +1,6 @@
-#!/bin/sh
+#!/usr/bin/env bash
+
+set -e
 
 if [ "$EUID" -ne 0 ]
 then
@@ -40,7 +42,7 @@ then
 elif [[ $1 = "subst" ]]
 then
     echo "Installing Substitute..."
-    rm -rf CydiaSubstrate.framework
+    rm -rf substitute CydiaSubstrate.framework
     git clone https://github.com/PoomSmart/substitute.git
     cd substitute/
     ./configure --xcode-sdk=iphonesimulator --xcode-archs=x86_64 && make