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Public story · 2026-09-11 · high
Farid Zakaria's tool runs a real x86_64 VM with no server, and a GitHub Action can post a link that boots a pull request's build straight in the browser.
Why now: Simon Willison wrote it up on September 10.
Farid Zakaria built trynix.dev, a tool that boots any version of a Nix package inside an x86_64 virtual machine running in a browser tab. That removes the setup step for anyone who wants to run a specific package version without installing Nix or a VM.
It runs on qemu-wasm, so there's no server doing the work. Every package version gets its own URL, so a link points at one exact build instead of a screenshot or a changelog line.
A companion GitHub Action comments on a pull request with a link to that PR's own build. Click it and the browser boots that exact code, no clone required.
I review a lot of agent-written PRs, and checking one out locally is the default step. A link that boots the real build in a VM skips it entirely. Click, watch it run, decide if it works, without touching the branch on your own machine.
Each link below shares sources, entities, or timing with this story.
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