Here is an example of doing what you want https://gist.github.com/Arkham/31297c1d75fc59f723a50063bc0f5739 https://gist.github.com/Arkham/31297c1d75fc59f723a5006

Here is an example of doing what you want https://gist.github.com/Arkham/31297c1d75fc59f723a50063bc0f5739 https://gist.github.com/Arkham/31297c1d75fc59f723a50063bc0f5... I found the nixpkgs versions using this tool: https://lazamar.co.uk/nix-versions/?channel=nixpkgs-unstable&package=ruby https://lazamar.co.uk/nix-versions/?channel=nixpkgs-unstable...