zchunk: 1.1.6 -> 1.1.8 | Add darwin support
zchunk: 1.1.6 -> 1.1.8 | Add darwin support

Zchunk previously couldn't compile on macOS and had to be skipped for macOS on some packages.
NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs