output

these derivations will be built:
  /nix/store/fsvia4xqi9gmsq460z6aphkkzlisi24r-backend-dependencies-0.0.0.drv
building '/nix/store/fsvia4xqi9gmsq460z6aphkkzlisi24r-backend-dependencies-0.0.0.drv'...
unpacking sources
unpacking source archive /nix/store/n1w10ai78i5bj375xpaw4yn90z15wrfr-package-lock.json
do not know how to unpack source archive /nix/store/n1w10ai78i5bj375xpaw4yn90z15wrfr-package-lock.json
builder for '/nix/store/fsvia4xqi9gmsq460z6aphkkzlisi24r-backend-dependencies-0.0.0.drv' failed with exit code 1
error: build of '/nix/store/fsvia4xqi9gmsq460z6aphkkzlisi24r-backend-dependencies-0.0.0.drv' failed

package.nix

{ pkgs ? import <nixpkgs> {} }:

let
  package = builtins.fromJSON (builtins.readFile ./package.json);
in with pkgs; stdenv.mkDerivation {
  pname = "${package.name}-dependencies";
  version = "${package.version}";
  srcs = [
    ./package-lock.json
    ./package.json
  ];
}