Name

       nix flake update - update flake lock file

Synopsis

       nix flake update [option…] inputs…

Examples

       •  Update all inputs (i.e. recreate the lock file from scratch):

       # nix flake update
       warning: updating lock file '/home/myself/repos/testflake/flake.lock':
       • Updated input 'nix':
         'github:NixOS/nix/9fab14adbc3810d5cc1f88672fde1eee4358405c' (2023-06-28)
       → 'github:NixOS/nix/8927cba62f5afb33b01016d5c4f7f8b7d0adde3c' (2023-07-11)
       • Updated input 'nixpkgs':
         'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30)
       → 'github:NixOS/nixpkgs/a3a3dda3bacf61e8a39258a0ed9c924eeca8e293' (2023-07-05)

       •  Update only a single input:

       # nix flake update nixpkgs
       warning: updating lock file '/home/myself/repos/testflake/flake.lock':
       • Updated input 'nixpkgs':
         'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30)
       → 'github:NixOS/nixpkgs/a3a3dda3bacf61e8a39258a0ed9c924eeca8e293' (2023-07-05)

       •  Update only a single input of a flake in a different directory:

       # nix flake update nixpkgs --flake ~/repos/another
       warning: updating lock file '/home/myself/repos/another/flake.lock':
       • Updated input 'nixpkgs':
         'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30)
       → 'github:NixOS/nixpkgs/a3a3dda3bacf61e8a39258a0ed9c924eeca8e293' (2023-07-05)

                     Note

                     When  trying  to  refer  to  a flake in a subdirectory, write ./another instead of another.
                     Otherwise Nix will try to look up the flake in the registry.

Description

       This command updates the inputs in a lock file (flake.lock).  By default, all inputs are updated. If  the
       lock  file  doesn’t  exist  yet, it will be created. If inputs are not in the lock file yet, they will be
       added.

       Unlike other nix flake commands, nix flake update takes a list of  names  of  inputs  to  update  as  its
       positional arguments and operates on the flake in the current directory.  You can pass a different flake-
       url with --flake to override that default.

       The  related  command  nix flake lock also creates lock files and adds missing inputs, but is safer as it
       will never update inputs already in the lock file.

Options

       •  --flake flake-url

          The flake to operate on. Default is the current directory.

   Common evaluation options
       •  --arg name expr

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

       •  --arg-from-file name path

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

       •  --arg-from-stdin name

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

       •  --argstr name string

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

       •  --debugger

          Start an interactive environment if evaluation fails.

       •  --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.

       •  --impure

          Allow access to mutable paths and repositories.

       •  --include / -I path

          Add path to search path entries used to resolve lookup paths

          This option may be given multiple times.

          Paths  added  through  -I  take  precedence  over  the nix-path configuration setting and the NIX_PATH
          environment variable.

       •  --override-flake original-ref resolved-ref

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

   Common flake-related options
       •  --commit-lock-file

          Commit changes to the flake’s lock file.

       •  --inputs-from flake-url

          Use the inputs of the specified flake as registry entries.

       •  --no-registries

          Don’t allow lookups in the flake registries.

                 DEPRECATED

                 Use --no-use-registries instead.

       •  --output-lock-file flake-lock-path

          Write the given lock file instead of flake.lock within the top-level flake.

       •  --override-input input-path flake-url

          Override a specific flake input (e.g. dwarffs/nixpkgs). This implies --no-write-lock-file.

       •  --recreate-lock-file

          Recreate the flake’s lock file from scratch.

                 DEPRECATED

                 Use nix flake update instead.

       •  --reference-lock-file flake-lock-path

          Read the given lock file instead of flake.lock within the top-level flake.

       •  --update-input input-path

          Update a specific flake input (ignoring its previous entry in the lock file).

                 DEPRECATED

                 Use nix flake update instead.

   Logging-related options
       •  --debug

          Set the logging verbosity level to ‘debug’.

       •  --log-format format

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

       •  --print-build-logs / -L

          Print full build logs on standard error.

       •  --quiet

          Decrease the logging verbosity level.

       •  --verbose / -v

          Increase the logging verbosity level.

   Miscellaneous global options
       •  --help

          Show usage information.

       •  --offline

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

       •  --option name value

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

       •  --refresh

          Consider all previously downloaded files out-of-date.

       •  --repair

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

       •  --version

          Show version information.

          Note

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

                                                                                            nix3-flake-update(1)