nix-versions

Works for everyone, at any level.

As a friendly CLI to explore available versions.

As a tools version manager and development shell.

As a flake generator for pinned-version packages.

Combine latest and dependable, stable versions.

Keep your compilers and tooling at known, stable releases that work with your current code.

And use the most recent version for other nixpkgs.

Plays well with existing tools.

Friendly with nix shell, direnv and advanced nix environments like devenv and devshell.

Usable as an input for any Flake and with fetchurl for non-flakes.

Powered by nix but requires no-wizardry™

All the advantages of Nix without much effort. Reproducibility, security checksums, sandboxed builds, caching, remote building.

Re-use your existing .ruby-version, .node-version project files.

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Try it now.

As a command line utility

nix run github:vic/nix-versions -- 'emacs@~27 || ~29' --all

As a flake.nix generator

You can use our flake.zip endpoint as an input on your own flake.nix or devenv.yaml. There’s also flake.nix endpoint that outputs a text file.

nix develop 'https://nix-versions.oeiuwq.com/flake.zip/cowsay@latest/go@1.24.x' --output-lock-file /dev/null

As a direnv shell generator

Our use_nix_tools.sh endpoint can get you a direnv shell in no time! You don’t even need nix-versions installed, just nix and direnv.

direnv fetchurl "https://nix-versions.oeiuwq.com/use_nix_tools.sh/ruby/cowsay"

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