Nix minimal version: 1.10 -> 1.11
`ruby` attribute requires features from 1.11```$ nix-build -A rubyerror: cannot coerce a set to a string, at pkgs/development/interpreters/ruby/default.nix:57:17```
Danylo Hlynskyi 8 years ago cc28cf11 09779623
··· 1 1 # Expose the minimum required version for evaluating Nixpkgs 2 2 - "1.10" 2 2 + "1.11"