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/v5sv61sszx301i0x6xysaqzla09nksnd-hello-2.10

•

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

# nix path-info -rS /run/current-system | sort -nk2
/nix/store/hl5xwp9kdrd1zkm0idm3kkby9q66z404-empty                                                96
/nix/store/27324qvqhnxj3rncazmxc4mwy79kz8ha-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 -rsSh nixpkgs#rustc
/nix/store/01rrgsg5zk3cds0xgdsq40zpk6g51dz9-ncurses-6.2-dev      386.7K   69.1M
/nix/store/0q783wnvixpqz6dxjp16nw296avgczam-libpfm-4.11.0          5.9M   37.4M
…

•

Check the existence of a path in a binary cache:

# nix path-info -r /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 'sort_by(.registrationTime)[-11:-1][].path'

•

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 -S \
| jq 'map(select(.closureSize > 1e9)) | sort_by(.closureSize) | map([.path, .closureSize])'
[
…,
[


  "/nix/store/zqamz3cz4dbzfihki2mk7a63mbkxz9xq-nixos-system-machine-20.09.20201112.3090c65",


  5887562256
]
]

•

Print the path of the 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, 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.

Options

• --closure-size / -S
  Print the sum of the sizes of the NAR serialisations of the closure of each path.
• --human-readable / -h
  With -s and -S, print sizes in a human-friendly format such as 5.67G.
• --json
  Produce output in JSON format, suitable for consumption by another program.
• --sigs
  Show signatures.
• --size / -s
  Print the size of the NAR serialisation of each path.

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).

Options that change the interpretation of installables:

• --all
  Apply the operation to every store path.
• --derivation
  Operate on the store derivation rather than its outputs.
• --expr expr
  Interpret installables as attribute paths relative to the Nix expression expr.
• --file / -f file
  Interpret installables as attribute paths relative to the Nix expression stored in file. If file is the character -, then a Nix expression will be read from standard input.
• --recursive / -r
  Apply operation to closure of the specified paths.