···11# `nix-versions` - All versions of nixpkgs at your fingerprints.
2233-`nix-versions` is a CLI tool that can help you [find the nixpkgs revision for particular versions of a package](https://nix-versions.alwaysdata.net/getting-started/listing-versions.html).
33+`nix-versions` is a CLI tool that can help you [find the nixpkgs revision for historical versions of a package](https://nix-versions.alwaysdata.net/getting-started/listing-versions.html).
4455-It does so by integrating the following backend services available on the nix ecosystem:
55+It does so by integrating the following services available to the nix ecosystem:
6677- https://search.nixos.org (via the [nix-search-cli](https://github.com/peterldowns/nix-search-cli) elastic-search client). Used to search packages by program name or attribute name wildcards.
88···12121313- https://history.nix-packages.con - another community provided versions index.
14141515-Any of these backends can be selected as default or combined on a per package basis.
1515+Any of these backends can be selected as default or combined on a per-package basis.
16161717+It also features [version constraint](https://github.com/Masterminds/semver?tab=readme-ov-file#hyphen-range-comparisons) filters, allowing you to restrict packages to a known set of compatible/stable versions that work with you.
17181818-It also features [version constraints](https://github.com/Masterminds/semver?tab=readme-ov-file#hyphen-range-comparisons) filters, letting you restrict packages to a know set of compatible/stable versions that work for you.
1919-2020-When used in conjuction with `nix shell` and `direnv`, `nix-versions` can also double as a plain-text [development shell and tools version manager with automatic environment loading](https://nix-versions.alwaysdata.net/tools-version-manager.html)
1919+When used in conjuction with `nix shell` and `direnv`, `nix-versions`, it can also double as a plain-text [development shell and tools version manager with automatic environment loading](https://nix-versions.alwaysdata.net/tools-version-manager.html) targeting people new to nix, but familiar with tools like npm, rvm, asdf, mise.
21202222-Our website provides a flakes generator endpoint that you can use as inputs on your own flakes, [providing constrained version updates](https://nix-versions.alwaysdata.net/flake-generator.html) that can guarantee you can get new updates as long as they match your specified constraints.
2121+Our website provides a flakes generator for version-pinned packages. You can use these generated flakes as inputs on your own flakes, [allowing version constrained package updates](https://nix-versions.alwaysdata.net/flake-generator.html).
23222423Read more at our [website](https://nix-versions.alwaysdata.net/)
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