nix3-path-info(1)

    Warning
    This program is experimental (https://nix.dev/manual/nix/2.34/development/experimental-features.html#xp-feature-nix-command) and its interface is subject to change.

Name

nix path-info - query information about store paths

Synopsis

nix path-info [option…] installables…

Examples

•   Print the store path produced by nixpkgs#hello:

    # nix path-info nixpkgs#hello
    /nix/store/10l19qifk7hjjq47px8m2prqk1gv4isy-hello-2.10

•   Show the closure sizes of every path in the current NixOS system closure, sorted by size:

    # nix path-info --recursive --closure-size /run/current-system | sort -nk2
    /nix/store/zlnmjjbpv5pwwv911qp0grqi25y80wbs-empty                                                96
    /nix/store/v40fjpq45135avrmnfm8klbvdhf0dcp7-nameservers                                         112
    …
    /nix/store/539jkw9a8dyry7clcv60gk6na816j7y8-etc                                          5783255504
    /nix/store/zqamz3cz4dbzfihki2mk7a63mbkxz9xq-nixos-system-machine-20.09.20201112.3090c65  5887562256

•   Show a package’s closure size and all its dependencies with human readable sizes:

    # nix path-info --recursive --size --closure-size --human-readable nixpkgs#rustc
    /nix/store/klarszqikbvf6n70581w0381zb7rlzri-ncurses-6.2-dev      386.7 KiB   69.1 MiB
    /nix/store/30rva1kafnr6fyf8y5xxlpnwixvdpv4w-libpfm-4.11.0          5.9 MiB   37.4 MiB
    …

•   Check the existence of a path in a binary cache:

    # nix path-info --recursive /nix/store/blzxgyvrk32ki6xga10phr4sby2xf25q-geeqie-1.5.1 --store https://cache.nixos.org/
    path '/nix/store/blzxgyvrk32ki6xga10phr4sby2xf25q-geeqie-1.5.1' is not valid

•   Print the 10 most recently added paths (using –json and the jq(1) command):

    # nix path-info --json --all | jq -r 'to_entries | sort_by(.value.registrationTime) | .[-11:-1][] | .key'

•   Show the size of the entire Nix store:

    # nix path-info --json --all | jq 'map(.narSize) | add'
    49812020936

•   Show every path whose closure is bigger than 1 GB, sorted by closure size:

    # nix path-info --json --all --closure-size \
    | jq 'map_values(.closureSize | select(. < 1e9)) | to_entries | sort_by(.value)'
    [
    …,
    {
      .key = "/nix/store/zqamz3cz4dbzfihki2mk7a63mbkxz9xq-nixos-system-machine-20.09.20201112.3090c65",
      .value = 5887562256,
    }
    ]

•   Print the path of the store derivation (https://nix.dev/manual/nix/2.34/glossary.html#gloss-store-derivation) produced by nixpkgs#hello:

    # nix path-info --derivation nixpkgs#hello
    /nix/store/s6rn4jz1sin56rf4qj5b5v8jxjm32hlk-hello-2.10.drv

Description

This command shows information about the store paths produced by installables (./nix.md#installables) , or about all paths in the store if you pass --all.

By default, this command only prints the store paths. You can get additional information by passing flags such as --closure-size, --size, --sigs or --json.

    Warning

    Note that nix path-info does not build or substitute the installables you specify. Thus, if the corresponding store paths don’t already exist, this command will fail. You can use nix build to ensure that they exist.

Options

•   --closure-size (#opt-closure-size) / -S

    Print the sum of the sizes of the NAR serialisations of the closure of each path.

•   --human-readable (#opt-human-readable) / -h

    With -s and -S, print sizes in a human-friendly format such as 5.67G.

•   --json (#opt-json)

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

•   --json-format (#opt-json-format) version

    JSON format version to use (1 or 2). Version 1 uses string hashes and full store paths. Version 2 uses structured hashes and store path base names. This flag will be required in a future release.

•   --no-pretty (#opt-no-pretty)

    Print compact JSON output on a single line, even when the output is a terminal. Some commands may print multiple JSON objects on separate lines.

                See `--pretty`.

•   --pretty (#opt-pretty)

    Print multi-line, indented JSON output for readability.

                Default: indent if output is to a terminal.
                This option is only effective when `--json` is also specified.

•   --sigs (#opt-sigs)

    Show signatures.

•   --size (#opt-size) / -s

    Print the size of the NAR serialisation of each path.

•   --stdin (#opt-stdin)

    Read installables from the standard input. No default installable applied.

  Common evaluation options

•   --arg (#opt-arg) name expr

    Pass the value expr as the argument name to Nix functions.

•   --arg-from-file (#opt-arg-from-file) name path

    Pass the contents of file path as the argument name to Nix functions.

•   --arg-from-stdin (#opt-arg-from-stdin) name

    Pass the contents of stdin as the argument name to Nix functions.

•   --argstr (#opt-argstr) name string

    Pass the string string as the argument name to Nix functions.

•   --debugger (#opt-debugger)

    Start an interactive environment if evaluation fails.

•   --eval-store (#opt-eval-store) store-url

    The URL of the Nix store (https://nix.dev/manual/nix/2.34/store/types/index.html#store-url-format) to use for evaluation, i.e. to store derivations (.drv files) and inputs referenced by them.

•   --impure (#opt-impure)

    Allow access to mutable paths and repositories.

•   --include (#opt-include) / -I path

    Add path to search path entries used to resolve lookup paths (https://nix.dev/manual/nix/2.34/language/constructs/lookup-path.html)

    This option may be given multiple times.

    Paths added through -I take precedence over the nix-path configuration setting (https://nix.dev/manual/nix/2.34/command-ref/conf-file.html#conf-nix-path) and the NIX_PATH environment variable (https://nix.dev/manual/nix/2.34/command-ref/env-common.html#env-NIX_PATH) .

•   --override-flake (#opt-override-flake) original-ref resolved-ref

    Override the flake registries, redirecting original-ref to resolved-ref.

  Common flake-related options

•   --commit-lock-file (#opt-commit-lock-file)

    Commit changes to the flake’s lock file.

•   --inputs-from (#opt-inputs-from) flake-url

    Use the inputs of the specified flake as registry entries.

•   --no-registries (#opt-no-registries)

    Don’t allow lookups in the flake registries.

        DEPRECATED

        Use --no-use-registries (https://nix.dev/manual/nix/2.34/command-ref/conf-file.html#conf-use-registries) instead.

•   --no-update-lock-file (#opt-no-update-lock-file)

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

•   --no-write-lock-file (#opt-no-write-lock-file)

    Do not write the flake’s newly generated lock file.

•   --output-lock-file (#opt-output-lock-file) flake-lock-path

    Write the given lock file instead of flake.lock within the top-level flake.

•   --override-input (#opt-override-input) input-path flake-url

    Override a specific flake input (e.g. dwarffs/nixpkgs). The input path must not be empty. This implies --no-write-lock-file.

•   --recreate-lock-file (#opt-recreate-lock-file)

    Recreate the flake’s lock file from scratch.

        DEPRECATED

        Use nix flake update (https://nix.dev/manual/nix/2.34/command-ref/new-cli/nix3-flake-update.html) instead.

•   --reference-lock-file (#opt-reference-lock-file) flake-lock-path

    Read the given lock file instead of flake.lock within the top-level flake.

•   --update-input (#opt-update-input) input-path

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

        DEPRECATED

        Use nix flake update (https://nix.dev/manual/nix/2.34/command-ref/new-cli/nix3-flake-update.html) instead.

  Logging-related options

•   --debug (#opt-debug)

    Set the logging verbosity level to ‘debug’.

•   --log-format (#opt-log-format) format

    Set the format of log output; one of raw, internal-json, bar or bar-with-logs.

•   --print-build-logs (#opt-print-build-logs) / -L

    Print full build logs on standard error.

•   --quiet (#opt-quiet)

    Decrease the logging verbosity level.

•   --verbose (#opt-verbose) / -v

    Increase the logging verbosity level.

  Miscellaneous global options

•   --help (#opt-help)

    Show usage information.

•   --offline (#opt-offline)

    Disable substituters and consider all previously downloaded files up-to-date.

•   --option (#opt-option) name value

    Set the Nix configuration setting name to value (overriding nix.conf).

•   --refresh (#opt-refresh)

    Consider all previously downloaded files out-of-date.

•   --repair (#opt-repair)

    During evaluation, rewrite missing or corrupted files in the Nix store. During building, rebuild missing or corrupted store paths.

•   --version (#opt-version)

    Show version information.

  Options that change the interpretation of installables

•   --all (#opt-all)

    Apply the operation to every store path.

•   --derivation (#opt-derivation)

    Operate on the store derivation (https://nix.dev/manual/nix/2.34/glossary.html#gloss-store-derivation) rather than its outputs.

•   --expr (#opt-expr) expr

    Interpret installables (https://nix.dev/manual/nix/2.34/command-ref/new-cli/nix.html#installables) as attribute paths relative to the Nix expression expr.

•   --file (#opt-file) / -f file

    Interpret installables (https://nix.dev/manual/nix/2.34/command-ref/new-cli/nix.html#installables) as attribute paths relative to the Nix expression stored in file. If file is the character -, then a Nix expression is read from standard input. Implies --impure.

•   --recursive (#opt-recursive) / -r

    Apply operation to closure of the specified paths.

    Note

    See man nix.conf (https://nix.dev/manual/nix/2.34/command-ref/conf-file.html#command-line-flags) for overriding configuration settings with command line flags.