If you want to do Fedora Silverblue + nixpkgs, then the steps are a bit more complex that any other environment because of the immutable / requiring `chattr -i

If you want to do Fedora Silverblue + nixpkgs, then the steps are a bit more complex that any other environment because of the immutable / requiring `chattr -i /` and some `semanage fcontext` action in the `/nix` bind mountpoint to get things working. In theory you can use the special nixStatic build of `nix` and it should just work with unprivileged user namespaces but in my experiences with Silverblue you just get mysterious errors until you get a bind mountpoint going.