fix: resolve nix build warnings

deploy/colmena.nix

@@ -17,7 +17,7 @@ in
 inputs.colmena.lib.makeHive {
   meta = {
     nixpkgs = import inputs.nixpkgs {
-      system = "x86_64-linux";
+      localSystem = "x86_64-linux";
     };
 
     nodeNixpkgs = builtins.mapAttrs (_: v: v.pkgs) self.nixosConfigurations;