nix3-registry-add(1)        General Commands Manual       nix3-registry-add(1)


              Warning
              This program is experimental and its interface is subject to
              change.

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

Synopsis
       nix registry add [option<?>] from-url to-url

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

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

       o  Pin nixpkgs to a specific revision:

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

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

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

       o  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.

Options
       o  --registry registry

          The registry to operate on.

   Common evaluation options
       o  --arg name expr

          Pass the value expr as the argument name to Nix functions.

       o  --arg-from-file name path

          Pass the contents of file path as the argument name to Nix
          functions.

       o  --arg-from-stdin name

          Pass the contents of stdin as the argument name to Nix functions.

       o  --argstr name string

          Pass the string string as the argument name to Nix functions.

       o  --eval-store store-url

          The URL of the Nix store to use for evaluation, i.e. to store
          derivations (.drv files) and inputs referenced by them.

       o  --impure

          Allow access to mutable paths and repositories.

       o  --include / -I path

          Add path to the Nix search path. The Nix search path is initialized
          from the colon-separated NIX_PATH environment variable, and is used
          to look up the location of Nix expressions using paths enclosed in
          angle brackets (i.e., <nixpkgs>).

          For instance, passing

       -I /home/eelco/Dev
       -I /etc/nixos

              will cause Nix to look for paths relative to /home/eelco/Dev and
              /etc/nixos, in that order. This is equivalent to setting the
              NIX_PATH environment variable to

       /home/eelco/Dev:/etc/nixos

              It is also possible to match paths against a prefix. For
              example, passing

       -I nixpkgs=/home/eelco/Dev/nixpkgs-branch
       -I /etc/nixos

              will cause Nix to search for <nixpkgs/path> in
              /home/eelco/Dev/nixpkgs-branch/path and /etc/nixos/nixpkgs/path.

              If a path in the Nix search path starts with http:// or
              https://, it is interpreted as the URL of a tarball that will be
              downloaded and unpacked to a temporary location. The tarball
              must consist of a single top-level directory. For example,
              passing

       -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/master.tar.gz

              tells Nix to download and use the current contents of the master
              branch in the nixpkgs repository.

              The URLs of the tarballs from the official nixos.org channels
              (see the manual page for nix-channel) can be abbreviated as
              channel:<channel-name>. For instance, the following two flags
              are equivalent:

       -I nixpkgs=channel:nixos-21.05
       -I nixpkgs=https://nixos.org/channels/nixos-21.05/nixexprs.tar.xz

              You can also fetch source trees using flake URLs and add them to
              the search path. For instance,

       -I nixpkgs=flake:nixpkgs

              specifies that the prefix nixpkgs shall refer to the source tree
              downloaded from the nixpkgs entry in the flake registry.
              Similarly,

       -I nixpkgs=flake:github:NixOS/nixpkgs/nixos-22.05

              makes <nixpkgs> refer to a particular branch of the
              NixOS/nixpkgs repository on GitHub.

       o  --override-flake original-ref resolved-ref

          Override the flake registries, redirecting original-ref to resolved-
          ref.

   Logging-related options
       o  --debug

          Set the logging verbosity level to `debug'.

       o  --log-format format

          Set the format of log output; one of raw, internal-json, bar or
          bar-with-logs.

       o  --print-build-logs / -L

          Print full build logs on standard error.

       o  --quiet

          Decrease the logging verbosity level.

       o  --verbose / -v

          Increase the logging verbosity level.

   Miscellaneous global options
       o  --help

          Show usage information.

       o  --offline

          Disable substituters and consider all previously downloaded files
          up-to-date.

       o  --option name value

          Set the Nix configuration setting name to value (overriding
          nix.conf).

       o  --refresh

          Consider all previously downloaded files out-of-date.

       o  --repair

          During evaluation, rewrite missing or corrupted files in the Nix
          store. During building, rebuild missing or corrupted store paths.

       o  --version

          Show version information.

          Note

          See man nix.conf for overriding configuration settings with command
          line flags.

                                                          nix3-registry-add(1)