node2nix override; wrapProgram: command not found - nix

Question

I'm packaging a node script with an external dependency (GraphicsMagick), and when attempting to override the derivation generated from node2nix I get the error:
wrapProgram: command not found
The following text goes into detail of what I've tried to solve this error.
Reproducing the problem from scratch
I've created a minimal git repository that reproduces this problem if you'd just like to take a look there. Else, the steps to reproduce the problem are below.
Initial Shell Session:
In an empty directory, run:
npm init -y
npm install --save gm
curl https://i.imgur.com/addSfQi.jpg > image.png
(npm version: 5.6.0 & node version v8.9.4)
Create index.js
#!/usr/bin/env node
const path = require("path"); // node.js builtin
const gm = require("gm"); // GraphicsMagick module
const imagePath = path.join(__dirname, "image.png");
// Flip image horizontally and write to disk
gm(imagePath)
.flop()
.write(imagePath, error => {
console.log("error:", error);
});
Add a "bin" section to package.json:
"bin": "index.js"
Generate *.nix files with node2nix
node2nix -8 -l package-lock.json
Create override.nix
{ pkgs ? import <nixpkgs> {}
, system ? builtins.currentSystem
}:
let
nodePackages = import ./default.nix {
inherit pkgs system;
};
in
nodePackages // {
package = nodePackages.package.override (oldAttrs: {
postInstall = ''
wrapProgram "$out/bin/test-nodejs-gm-nixpkg" --prefix PATH : "${pkgs.graphicsmagick}/bin"
'';
});
}
Build nix package
nix-build override.nix -A package
The above fails with:
/nix/store/*/setup: line 95: wrapProgram: command not found
Helpful Resources
node2nix git repository - includes some basic examples.
example override in nixpkgs - example of how nixpkgs uses wrapProgram in postInstall with files generated by node2nix.

Answer 1

wrapProgram is contained within the makeWrapper package.
nativeBuildInputs = oldAttrs.nativeBuildInputs or [] ++ [ pkgs.makeWrapper ];
As mentioned by #ppb in the comments.