$ arch -x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

​

​

### I made sure /opt/homebrew/bin was in my path before /usr/local/bin. Then I aliased the Intel brew to ibrew so it’s easier to select. Here’s what I added to my ZSH configuration:

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export PATH="/opt/homebrew/bin:/usr/local/bin:$PATH"

alias ibrew='arch -x86_64 /usr/local/bin/brew'

​

### then just run

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ibrew tap homebrew/versions

ibrew install v8-315

gem install libv8 -v '3.16.14.19' -- --with-system-v8

gem install therubyracer -v '0.12.3' -- --with-v8-dir=/usr/local/opt/v8@3.15