into ~/.bash_profile add:
export ANDROID_HOME="/path/to/android-sdk-macosx"
export PATH="$ANDROID_HOME/platform-tools:$ANDROID_HOME/tools:$PATH"
and then execute it in terminal to take effect immediately;
into /etc/sudoers add: (you can use console: sudo visudo)
Defaults env_keep += "ANDROID_HOME"
since the building process has to start with sudo and Node's process.env get the respective variables.