SYNOPSIS
       nix-store [--help] [--version] [{--verbose | -v}...] [--quiet]
                 [--no-build-output | -Q] [{--max-jobs | -j} number]

...

       --verbose / -v
           Increases the level of verbosity of diagnostic messages printed on
           standard error. For each Nix operation, the information printed on
           standard output is well-defined; any diagnostic information is printed
           on standard error, never on standard output.

           This option may be specified repeatedly. Currently, the following
           verbosity levels exist:

           0
               “Errors only”: only print messages explaining why the Nix
               invocation failed.

           1
               “Informational”: print useful messages about what Nix is doing.
               This is the default.

           2
               “Talkative”: print more informational messages.

           3
               “Chatty”: print even more informational messages.

           4
               “Debug”: print debug information.

           5
               “Vomit”: print vast amounts of debug information.

       --quiet
           Decreases the level of verbosity of diagnostic messages printed on
           standard error. This is the inverse option to -v / --verbose.

           This option may be specified repeatedly. See the previous verbosity
           levels list.