#nix is now packaged for #Fedora! This also means it works again on #Silverblue following the system changes introduced in Silverblue 42(?) — great news . Tested it, and my nix-based development environments appear to function correctly. However, legacy nix is not supported.
https://src.fedoraproject.org/rpms/nix
https://discourse.nixos.org/t/nix-package-manager-now-available-in-fedora/73932