Nix 2.29.0
Nix, the purely functional package manager; unstable internal interfaces
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derivation-show

R""(

Examples

  • Show the store derivation that results from evaluating the Hello package:

    # nix derivation show nixpkgs#hello
    {
    "/nix/store/s6rn4jz1sin56rf4qj5b5v8jxjm32hlk-hello-2.10.drv": {
    }
    }
  • Show the full derivation graph (if available) that produced your NixOS system:

    # nix derivation show -r /run/current-system
  • Print all files fetched using fetchurl by Firefox's dependency graph:

    # nix derivation show -r nixpkgs#firefox \
    | jq -r '.[] | select(.outputs.out.hash and .env.urls) | .env.urls' \
    | uniq | sort

    Note that .outputs.out.hash selects fixed-output derivations (derivations that produce output with a specified content hash), while .env.urls selects derivations with a urls attribute.

Description

This command prints on standard output a JSON representation of the store derivations to which installables evaluate.

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.

By default, this command only shows top-level derivations, but with --recursive, it also shows their dependencies.

nix derivation show outputs a JSON map of store paths to derivations in the following format:

{{#include ../../protocols/json/derivation.md}}

)""