Name

       nix flake update - update flake lock file

Synopsis

       nix flake update [option…] flake-url

Examples

       • Recreate the lock file (i.e. update all inputs) and commit the new lock file:

       # nix flake update
       * Updated 'nix': 'github:NixOS/nix/9fab14adbc3810d5cc1f88672fde1eee4358405c' -> 'github:NixOS/nix/8927cba62f5afb33b01016d5c4f7f8b7d0adde3c'
       * Updated 'nixpkgs': 'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' -> 'github:NixOS/nixpkgs/a3a3dda3bacf61e8a39258a0ed9c924eeca8e293'
       …
       warning: committed new revision '158bcbd9d6cc08ab859c0810186c1beebc982aad'

Description

       This  command  recreates the lock file of a flake (flake.lock), thus updating the lock for
       every mutable input (like nixpkgs) to its current version. This is equivalent  to  passing
       --recreate-lock-file to any command that operates on a flake. That is,

       # nix flake update
       # nix build

       is equivalent to:

       # nix build --recreate-lock-file

Options

       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.

       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. This option is deprecated; use --no-use-
         registries.

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

                                                                             nix3-flake-update(1)