[grudg3]

This looks interesting but it seems that if you're wanting to use specific versions of two separate packages, that are not in the same nixpkgs commit, you're a bit out of luck. For example, if I want to use an older version of Terraform with a newer version of the Terraform AzureRM provider, I couldn't quite figure out a way to do it...

[domenkozar]

That's something that still needs to be supported and I'll be working on it next week as part of the https://oceansprint.org

[madduci]

And isolated GUI apps would be also nice to have