Name¶

nix registry add - add/replace flake in user flake registry

Synopsis¶

nix registry add [option…] from-url to-url

Examples¶

•

Set the nixpkgs flake identifier to a specific branch of Nixpkgs:

# nix registry add nixpkgs github:NixOS/nixpkgs/nixos-20.03

•

Pin nixpkgs to a specific revision:

# nix registry add nixpkgs github:NixOS/nixpkgs/925b70cd964ceaedee26fde9b19cc4c4f081196a

•

Add an entry that redirects a specific branch of nixpkgs to another fork:

# nix registry add nixpkgs/nixos-20.03 ~/Dev/nixpkgs

•

Add nixpkgs pointing to github:nixos/nixpkgs to your custom flake registry:

nix registry add --registry ./custom-flake-registry.json nixpkgs github:nixos/nixpkgs

Description¶

This command adds an entry to the user registry that maps flake reference from-url to flake reference to-url. If an entry for from-url already exists, it is overwritten.

Entries can be removed using nix registry remove (./nix3-registry-remove.md).

Options¶

•

--registry registry
The registry to operate on.

Common evaluation options:

• --arg name expr
  Pass the value expr as the argument name to Nix functions.
• --argstr name string
  Pass the string string as the argument name to Nix functions.
• --eval-store store-url
  The Nix store to use for evaluations.
• --impure
  Allow access to mutable paths and repositories.
• --include / -I path
  Add path to the list of locations used to look up <...> file names.
• --override-flake original-ref resolved-ref
  Override the flake registries, redirecting original-ref to resolved-ref.