move main module import to configuration.nix

examples/configuration.nix

@@ -4,6 +4,8 @@
 
 { config, pkgs, lib, ... }: {
   imports = [
+    <nix-bitcoin/modules/nix-bitcoin.nix>
+
     # Use hardened kernel profile. See
     # https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/profiles/hardened.nix
     # for the enabled options.

examples/nixops/node.nix

@@ -4,7 +4,6 @@
   bitcoin-node = { config, pkgs, lib, ... }: {
     imports = [
       ../configuration.nix
-      <nix-bitcoin/modules/nix-bitcoin.nix>
       <nix-bitcoin/modules/deployment/nixops.nix>
     ];