Name

nix store verify - verify the integrity of store paths

Synopsis

nix store verify [option...] installables...

Check whether each path in the closure of Firefox has at least 2 signatures:

# nix store verify --recursive --sigs-needed 2 --no-contents $(type -p firefox)

Verify a store path in the binary cache https://cache.nixos.org/:

# nix store verify --store https://cache.nixos.org/ \
    /nix/store/v5sv61sszx301i0x6xysaqzla09nksnd-hello-2.10

This command verifies the integrity of the store paths installables, or, if --all is given, the entire Nix store. For each path, it checks that

its contents match the NAR hash recorded in the Nix database; and
it is trusted, that is, it is signed by at least one trusted signing key, is content-addressed, or is built locally ("ultimately trusted").

The exit status of this command is the sum of the following values:

1 if any path is corrupted (i.e. its contents don't match the recorded NAR hash).
2 if any path is untrusted.
4 if any path couldn't be verified for any other reason (such as an I/O error).

--no-contents

Do not verify the contents of each store path.
--no-trust

Do not verify whether each store path is trusted.
--sigs-needed / -n n

Require that each path is signed by at least n different keys.
--stdin

Read installables from the standard input. No default installable applied.
--substituter / -s store-uri

Use signatures from the specified store.

--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.

--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.

DEPRECATED

Use --no-use-registries instead.
--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.
--output-lock-file flake-lock-path

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

DEPRECATED

Use nix flake update instead.
--reference-lock-file flake-lock-path

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

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

DEPRECATED

Use nix flake update instead.

--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.

--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.

--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 is read from standard input. Implies --impure.
--recursive / -r

Apply operation to closure of the specified paths.

Note

See man nix.conf for overriding configuration settings with command line flags.