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'
    ├───packages
    │   ├───aarch64-linux
    │   │   └───default: package 'patchelf-0.12.20201207.f34751b'
    │   ├───i686-linux
    │   │   └───default: package 'patchelf-0.12.20201207.f34751b'
    │   └───x86_64-linux
    │       └───default: 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

  • --all-systems

    Show the contents of outputs for all systems.

  • --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.

  • --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.

  • --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.