Nix 2.29.0
Nix, the purely functional package manager; unstable internal interfaces
 
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print-dev-env

R""(

Examples

  • Apply the build environment of GNU hello to the current shell:

    # . <(nix print-dev-env nixpkgs#hello)
  • Get the build environment in JSON format:

    # nix print-dev-env nixpkgs#hello --json

    The output will look like this:

    {
    "bashFunctions": {
    "buildPhase": " \n runHook preBuild;\n...",
    ...
    },
    "variables": {
    "src": {
    "type": "exported",
    "value": "/nix/store/3x7dwzq014bblazs7kq20p9hyzz0qh8g-hello-2.10.tar.gz"
    },
    "postUnpackHooks": {
    "type": "array",
    "value": ["_updateSourceDateEpochFromSourceRoot"]
    },
    ...
    }
    }

Description

This command prints a shell script that can be sourced by bash and that sets the variables and shell functions defined by the build process of installable. This allows you to get a similar build environment in your current shell rather than in a subshell (as with nix develop).

With --json, the output is a JSON serialisation of the variables and functions defined by the build process.

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