anchor.diff:      nixpkgsCross = {
         android = nixpkgs.lib.mapAttrs (_: args: nixpkgsFunc args) rec {
           arm64 = {
  +          inherit system;
             crossSystem = {
               config = "aarch64-unknown-linux-android";
               arch = "arm64";
  
positive.code:             };
          in {
          simulator64 = nixpkgsFunc {
            crossSystem = {
              # You can change config/arch/isiPhoneSimulator depending on your target:
              # aarch64-apple-darwin14 | arm64  | false
  
negative.code:           inherit config;
          };
          arm64 = nixpkgsFunc {
            inherit system;
            crossSystem = {
              # You can change config/arch/isiPhoneSimulator depending on your target:
              # aarch64-apple-darwin14 | arm64  | false
  