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

Name

nix flake show - show the outputs provided by a flake

Synopsis

nix flake show [option...] flake-url

Examples

• Show the output attributes provided by the patchelf flake:

  github:NixOS/patchelf/f34751b88bd07d7f44f5cd3200fb4122bf916c7e
  ├───checks
  │   ├───aarch64-linux
  │   │   └───build: derivation 'patchelf-0.12.20201207.f34751b'
  │   ├───i686-linux
  │   │   └───build: derivation 'patchelf-0.12.20201207.f34751b'
  │   └───x86_64-linux
  │       └───build: derivation 'patchelf-0.12.20201207.f34751b'
  ├───defaultPackage
  │   ├───aarch64-linux: package 'patchelf-0.12.20201207.f34751b'
  │   ├───i686-linux: package 'patchelf-0.12.20201207.f34751b'
  │   └───x86_64-linux: package 'patchelf-0.12.20201207.f34751b'
  ├───hydraJobs
  │   ├───build
  │   │   ├───aarch64-linux: derivation 'patchelf-0.12.20201207.f34751b'
  │   │   ├───i686-linux: derivation 'patchelf-0.12.20201207.f34751b'
  │   │   └───x86_64-linux: derivation 'patchelf-0.12.20201207.f34751b'
  │   ├───coverage: derivation 'patchelf-coverage-0.12.20201207.f34751b'
  │   ├───release: derivation 'patchelf-0.12.20201207.f34751b'
  │   └───tarball: derivation 'patchelf-tarball-0.12.20201207.f34751b'
  └───overlay: Nixpkgs overlay
  

Description

This command shows the output attributes provided by the flake specified by flake reference flake-url. These are the top-level attributes in the outputs of the flake, as well as lower-level attributes for some standard outputs (e.g. packages or checks).

With --json, the output is in a JSON representation suitable for automatic processing by other tools.

Options

• --json
  Produce output in JSON format, suitable for consumption by another program.

• --legacy
  Show the contents of the legacyPackages output.

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.

• --no-update-lock-file
  Do not allow any updates to the flake's lock file.

• --no-write-lock-file
  Do not write the flake's newly generated lock file.

• --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.

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