*nix is a general term to refer to the whole family of Unices, to the operating systems that follow the POSIX 1 standard. Ruby is a programming language, there's no general relationship between the two.
Which version of nix are you running? Did you enable the flakes feature in a config file, such as /etc/nix/nix.conf (through configuration.nix for example) or ~/.config/nix/nix.conf? You can check with nix show-config | grep experimental.
The reason its broken NixOS is a declarative operating system. This means that directories like /etc live inside the read-only /nix/store directory. Only the nix-daemon is allowed to mount the nix-store as writable. Therefore, you must create a systemd.services.
nix - How to install systemd service on nixos - Stack Overflow
I'm trying to enable allow "unfree" packages, either globally or per-package, when using MyNixOS (excellent Flake configuration app for Nix) with Nix Flakes on Mac OS. When trying to inst...
How to allow "unfree" packages in Nix, for each situation?: {NixOS, Nix ...
I would like to be able to install my system from configuration.nix without first having to run the nix-channel --add and nix-channel --update steps. Is there a way to automate this from configuration.nix?
I have tried multiple things with pem files, like providing rootCA of organization to NIX_SSL_CERT_FILE environment variable, combining rootCA with cert.pem, but nothing is working
Building Nix from source while specifying --with-store-dir=path Note that this would only define the store folder (/nix/store) to another location but not the whole /nix folder.