ark/modules/cachix/nix-cargo-integration.nix

{
  nix = {
    settings.substituters = ["https://nix-cargo-integration.cachix.org"];
    binaryCachePublicKeys = ["nix-cargo-integration.cachix.org-1:wphySON/RyTC2DCzwKPBQGLEZv5mj0s1I1lsfQObaLs="];
  };
}