Jqr rPackage error

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For the life of me, I cannot figure out how to use the rPackageOverrides attribute correctly. This shell.nix results in error: attribute 'jqr' missing.

let
  rPackageOverrides = p: {
    jqr = p.jqr.overrideDerivation (attrs: {
      preConfigure = "patchShebangs configure";
    });
  };
  pkgs = import <nixpkgs> {
    config = { inherit rPackageOverrides; };
  };
  rEnv = pkgs.rWrapper.override {
    packages = with pkgs.rPackages; [ jqr ];
  };
in with pkgs; mkShell {
  name = "test-jqr";
  version = "1.0.0";
  buildInputs = [ rEnv ];
}

I’d recommend adding an issue for the broken jqr package. Maybe an issue for documenting how to use rPackageOverrides correctly too.