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This presentation introduces "Alcoholless" Homebrew, which protects macOS hosts from potential malicious Homebrew packages by running Homebrew with a separate user account. A command running with this tool is only allowed to read and write its current directory.
While Alcoholless puts focus on Homebrew, it is also applicable to other package managers such as `pip install`, `npm install`, and `go install`. Aside from package management, it is even useful for running AI coding agents that may potentially execute harmful commands.
Alcoholless is also an attempt to reexamine the necessity of Linux-style containers that emerged in this century. It just utilizes 1990s' commands (`su`, `sudo`, `rsync`) and the macOS equivalent of `useradd` to implement container-like environments, without extending the XNU kernel to support Linux-style container syscalls.
Akihiro Suda is a software engineer at NTT Corporation. He has been a maintainer of Moby (dockerd), BuildKit, containerd, runc, etc. He is also a founder of nerdctl and Lima (CNCF project).
