Options Reference

All options are set under the flake-file namespace in any flake-parts module.

See the source: modules/options/default.nix

Top-level Options

Option	Type	Description
`flake-file.description`	`str`	Flake description string
`flake-file.nixConfig`	`attrs`	Nix binary cache / substituter config (free-form attrset)
`flake-file.outputs`	`str`	Literal Nix expression for the `outputs` function
`flake-file.formatter`	`pkgs -> drv`	Function producing the formatter used on the generated file
`flake-file.do-not-edit`	`str`	Header comment written at the top of the generated file

Input Options

Each input is declared under flake-file.inputs.<name>.

Option	Type	Description
`flake-file.inputs.<name>.url`	`str`	Source URL — e.g. `github:owner/repo`
`flake-file.inputs.<name>.type`	`str`	Reference type — `github`, `path`, `git`, etc.
`flake-file.inputs.<name>.owner`	`str`	Owner (for typed VCS refs)
`flake-file.inputs.<name>.repo`	`str`	Repository name
`flake-file.inputs.<name>.path`	`str`	Local path reference
`flake-file.inputs.<name>.id`	`str`	Flake registry id
`flake-file.inputs.<name>.dir`	`str`	Subdirectory within repo or path
`flake-file.inputs.<name>.narHash`	`str`	NAR hash pin
`flake-file.inputs.<name>.rev`	`str`	Commit hash pin
`flake-file.inputs.<name>.ref`	`str`	Branch or tag pin
`flake-file.inputs.<name>.host`	`str`	Custom host for git forges
`flake-file.inputs.<name>.submodules`	`bool`	Whether to fetch git submodules
`flake-file.inputs.<name>.flake`	`bool`	Is the input a flake? (default: `true`)
`flake-file.inputs.<name>.follows`	`str`	Follow another input’s resolved value
`flake-file.inputs.<name>.inputs.<dep>.follows`	`str`	Nested transitive follow
`flake-file.inputs.<name>.inputs.<dep>.inputs...`	`…`	Recursively follow deeper transitive deps

Example

flake-file = {
  description = "my awesome flake";
  nixConfig = {};
  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  inputs.nixpkgs-lib.follows = "nixpkgs";
  inputs.my-tool.flake = false;
  inputs.my-tool.url = "github:owner/my-tool";
  inputs.dep.inputs.nixpkgs.follows = "nixpkgs";
};

Style options

Option	Type	Description
`flake-file.style.sep.flake`	`str`	The separator used between the top-level attributes of the flake
`flake-file.style.sep.inputs`	`str`	The separator used between the top-level attributes of inputs
`flake-file.style.sep.inputSchema`	`str`	The separator used between the top-level attributes of an input schema
`flake-file.style.sep.nixConfig`	`str`	The separator used between the top-level attributes of nixConfig
`flake-file.style.sortPriority.flake`	`listOf str`	When alphabetically sorting the top-level attributes of the flake, names within this list will receive a higher sort order according to its index
`flake-file.style.sortPriority.inputs`	`listOf str`	When alphabetically sorting the top-level attributes of inputs, names within this list will receive a higher sort order according to its index
`flake-file.style.sortPriority.inputSchema`	`listOf str`	When alphabetically sorting the top-level attributes of an input schema, names within this list will receive a higher sort order according to its index
`flake-file.style.sortPriority.nixConfig`	`listOf str`	When alphabetically sorting the top-level attributes of nixConfig, names within this list will receive a higher sort order according to its index

Hook Options

Option	Type	Description
`flake-file.write-hooks`	`listOf hookType`	Ordered hooks run after `write-flake` writes the file
`flake-file.check-hooks`	`listOf hookType`	Ordered hooks run during flake check

Each hook has:

Field	Description
`index`	Integer — lower index runs first
`exec`	Shell command string to execute

Lock Flattening Options

Option	Type	Description
`flake-file.prune-lock.enable`	`bool`	Enable automatic `flake.lock` pruning after writing
`flake-file.prune-lock.program`	`pkgs -> drv`	Function building the lock-pruning executable

See Lock Flattening guide for usage.

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