trynix.dev boots any package from 13 years of Nix history in an x86_64 VM running in the browser
Simon Willison's Weblog·low signal
Farid Zakaria's trynix.dev runs a qemu-wasm x86_64 Linux VM entirely in the browser with no server. Each package version has its own URL, for example ?pkg=[redacted] gives a shell with Python 3.6.2 from 2017. A companion GitHub Action, trynix-preview, comments on a pull request with a link that boots that PR's build in the browser. Reviewers of agent-written PRs could use it to poke at the result without checking anything out locally.