R""(

Note: this command's interface is based heavily around installables, which you may want to read about first (nix --help).

Description

This command reads from standard input a JSON representation of a store derivation to which an installable evaluates.

Store derivations are used internally by Nix. They are store paths with extension .drv that represent the build-time dependency graph to which a Nix expression evaluates.

The JSON format is documented under the derivation show command.

)""