nix3-path-info(1) General Commands Manual nix3-path-info(1) Warning This program is experimental <@docroot@/development/experimental-features.md#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 o Print the store path produced by nixpkgs#hello: # nix path-info nixpkgs#hello /nix/store/v5sv61sszx301i0x6xysaqzla09nksnd-hello-2.10 o 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/hl5xwp9kdrd1zkm0idm3kkby9q66z404-empty 96 /nix/store/27324qvqhnxj3rncazmxc4mwy79kz8ha-nameservers 112 /nix/store/539jkw9a8dyry7clcv60gk6na816j7y8-etc 5783255504 /nix/store/zqamz3cz4dbzfihki2mk7a63mbkxz9xq-nixos-system-machine-20.09.20201112.3090c65 5887562256 o 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/01rrgsg5zk3cds0xgdsq40zpk6g51dz9-ncurses-6.2-dev 386.7 KiB 69.1 MiB /nix/store/0q783wnvixpqz6dxjp16nw296avgczam-libpfm-4.11.0 5.9 MiB 37.4 MiB o 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 o 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' o Show the size of the entire Nix store: # nix path-info --json --all | jq 'map(.narSize) | add' 49812020936 o 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, } ] o Print the path of the store derivation <@docroot@/glossary.md#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 o --closure-size <#opt-closure-size> / -S Print the sum of the sizes of the NAR serialisations of the closure of each path. o --human-readable <#opt-human-readable> / -h With -s and -S, print sizes in a human-friendly format such as 5.67G. o --json <#opt-json> Produce output in JSON format, suitable for consumption by another program. o --sigs <#opt-sigs> Show signatures. o --size <#opt-size> / -s Print the size of the NAR serialisation of each path. o --stdin <#opt-stdin> Read installables from the standard input. No default installable applied. Common evaluation options o --arg <#opt-arg> name expr Pass the value expr as the argument name to Nix functions. o --arg-from-file <#opt-arg-from-file> name path Pass the contents of file path as the argument name to Nix functions. o --arg-from-stdin <#opt-arg-from-stdin> name Pass the contents of stdin as the argument name to Nix functions. o --argstr <#opt-argstr> name string Pass the string string as the argument name to Nix functions. o --debugger <#opt-debugger> Start an interactive environment if evaluation fails. o --eval-store <#opt-eval-store> store-url The URL of the Nix store <@docroot@/store/types/index.md#store-url-format> to use for evaluation, i.e. to store derivations (.drv files) and inputs referenced by them. o --impure <#opt-impure> Allow access to mutable paths and repositories. o --include <#opt-include> / -I path Add path to search path entries used to resolve lookup paths <@docroot@/language/constructs/lookup-path.md> This option may be given multiple times. Paths added through -I take precedence over the nix-path configuration setting <@docroot@/command-ref/conf-file.md#conf-nix-path> and the NIX_PATH environment variable <@docroot@/command-ref/env-common.md#env-NIX_PATH>. o --override-flake <#opt-override-flake> original-ref resolved-ref Override the flake registries, redirecting original-ref to resolved- ref. Common flake-related options o --commit-lock-file <#opt-commit-lock-file> Commit changes to the flake's lock file. o --inputs-from <#opt-inputs-from> flake-url Use the inputs of the specified flake as registry entries. o --no-registries <#opt-no-registries> Don't allow lookups in the flake registries. DEPRECATED Use --no-use-registries <#opt-no-use-registries> instead. o --no-update-lock-file <#opt-no-update-lock-file> Do not allow any updates to the flake's lock file. o --no-write-lock-file <#opt-no-write-lock-file> Do not write the flake's newly generated lock file. o --output-lock-file <#opt-output-lock-file> flake-lock-path Write the given lock file instead of flake.lock within the top-level flake. o --override-input <#opt-override-input> input-path flake-url Override a specific flake input (e.g. dwarffs/nixpkgs). This implies --no-write-lock-file. o --recreate-lock-file <#opt-recreate-lock-file> Recreate the flake's lock file from scratch. DEPRECATED Use nix flake update <@docroot@/command-ref/new-cli/nix3-flake-update.md> instead. o --reference-lock-file <#opt-reference-lock-file> flake-lock-path Read the given lock file instead of flake.lock within the top-level flake. o --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 <@docroot@/command-ref/new-cli/nix3-flake-update.md> instead. Logging-related options o --debug <#opt-debug> Set the logging verbosity level to `debug'. o --log-format <#opt-log-format> format Set the format of log output; one of raw, internal-json, bar or bar- with-logs. o --print-build-logs <#opt-print-build-logs> / -L Print full build logs on standard error. o --quiet <#opt-quiet> Decrease the logging verbosity level. o --verbose <#opt-verbose> / -v Increase the logging verbosity level. Miscellaneous global options o --help <#opt-help> Show usage information. o --offline <#opt-offline> Disable substituters and consider all previously downloaded files up-to-date. o --option <#opt-option> name value Set the Nix configuration setting name to value (overriding nix.conf). o --refresh <#opt-refresh> Consider all previously downloaded files out-of-date. o --repair <#opt-repair> During evaluation, rewrite missing or corrupted files in the Nix store. During building, rebuild missing or corrupted store paths. o --version <#opt-version> Show version information. Options that change the interpretation of installables o --all <#opt-all> Apply the operation to every store path. o --derivation <#opt-derivation> Operate on the store derivation <@docroot@/glossary.md#gloss-store-derivation> rather than its outputs. o --expr <#opt-expr> expr Interpret installables <@docroot@/command-ref/new-cli/nix.md#installables> as attribute paths relative to the Nix expression expr. o --file <#opt-file> / -f file Interpret installables <@docroot@/command-ref/new-cli/nix.md#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. Implies --impure. o --recursive <#opt-recursive> / -r Apply operation to closure of the specified paths. Note See man nix.conf <@docroot@/command-ref/conf-file.md#command-line-flags> for overriding configuration settings with command line flags. nix3-path-info(1)