Warning: This program is experimental and its interface is subject to change.

Name

nix store verify - verify the integrity of store paths

Synopsis

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

Verify the entire Nix store:
```
# nix store verify --all
```
Check whether each path in the closure of Firefox has at least 2 signatures:
```
# nix store verify -r -n2 --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 has at least n valid signatures.
--substituter / -s store-uri
Use signatures from the specified store.

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.