tldr/pages/common/nix3-registry.md

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# 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`