nix registry

Manage a Nix flake registry. See tldr nix3 flake for information about flakes. More information: https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-registry.html.

• Pin the nixpkgs revision to the current version of the upstream repository:
  nix registry pin {{nixpkgs}}
• Pin an entry to the latest version of the branch, or a particular reivision of a github repository:
  nix registry pin {{entry}} {{github:owner/repo/branch_or_revision}}
• Add a new entry that always points to the latest version of a github repository, updating automatically:
  nix registry add {{entry}} {{github:owner/repo}}
• Remove a registry entry:
  nix registry remove {{entry}}
• See documentation about what Nix flake registries are:
  nix registry --help