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Coming from Nix (guix's more popular, but less freedom-focused cousin).. I think part of what makes Nix "next generation" is that its functionality allows for more powerful use than "install/upgrade/uninstall package".

It's neat to be able to use some program without having to install/uninstall it.

I find it useful to be able to programmatically declare a set of packages (& lock their versions) that I want available when working on a project.

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guix allows the user to do those things as well. Ephemeral shells with packages made available and specific environment declarations as a file are both documented and mature.

They seem to have been pointing at Nix since they're more familiar, but acknowledging that Guix is similar in most regards. ("guix's more popular, but less freedom-focused cousin")

Look at `guix shell` and manifest.scm.

`guix shell --container` is also very useful.

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