Much more common than you would expect coming from a traditional package manager, since Nix freely allows multiple versions of packages to coexist. E.g., many f

Much more common than you would expect coming from a traditional package manager, since Nix freely allows multiple versions of packages to coexist. E.g., many folks run a stable release of NixOS but install select user packages from unstable, while most development environment and packaging scenarios will pin to a specific commit of nixpkgs. Nevertheless, there is an alternative CLI that infers "nixpkgs" when omitted, but I can't seem to find it right now.