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nix3-flake-lock(1)	     General Commands Manual	      nix3-flake-lock(1)

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

Name
     nix flake lock - create missing lock file entries

Synopsis
     nix flake lock [option...] flake-url

Examples
     *	Create the lock file for the flake in the current directory:

     # nix flake lock
     warning: creating lock file '/home/myself/repos/testflake/flake.lock':
     ac Added input 'nix':
       'github:NixOS/nix/9fab14adbc3810d5cc1f88672fde1eee4358405c' (2023-06-28)
     ac Added input 'nixpkgs':
       'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30)

     *	Add  missing  inputs  to the lock file for a flake in a different direc-
	tory:

     # nix flake lock ~/repos/another
     warning: updating lock file '/home/myself/repos/another/flake.lock':
     ac Added input 'nixpkgs':
       'github:NixOS/nixpkgs/3d2d8f281a27d466fa54b469b5993f7dde198375' (2023-06-30)

		   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 lock file of a flake (flake.lock) so that it con-
     tains an up-to-date lock for every flake input specified in flake.nix. Lock
     file entries are already up-to-date are not modified.

     If you want to update existing lock entries, use nix flake update

Options
   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  deriva-
	tions (.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.

     *	--no-update-lock-file

	Do not allow any updates to the flake's lock file.

     *	--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-lock(1)

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