*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.
nix - How to install systemd service on nixos - Stack Overflow
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
Since then, Nix has started to support systemd unit installations and since Catalina, macOS installations have become more complex too. This answer is not official documentation. The " curl | sh " installer for Nix on Linux does not install the Nix daemon, so the only things to delete are /nix, the line in ~/.profile and ~/.nix-profile.
Other than failing a nix-build and looking for the expected hash in the build log, what is the best way to proactively compute the hash ahead of filling in the argument to fetchFromGitHub (and other similar “Git forge” fetchers)?