🐛 fix deprecation errors

flake.nix

@@ -9,7 +9,7 @@
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     stable.url = "github:nixos/nixpkgs/nixos-21.11";
     nur.url = "github:nix-community/NUR";
-    utils.url = "github:gytis-ivaskevicius/flake-utils-plus/1.3.0";
+    utils.url = "github:gytis-ivaskevicius/flake-utils-plus";
     agenix.url = "github:ryantm/agenix";
 
     emacs-overlay.url = "github:nix-community/emacs-overlay";

modules/cachix.nix

@@ -5,9 +5,9 @@ let
   folder = ./cachix;
   toImport = name: value: folder + ("/" + name);
   filterCaches = key: value: value == "regular" && lib.hasSuffix ".nix" key;
-  imports = lib.mapAttrsToList toImport (lib.filterAttrs filterCaches (builtins.readDir folder));
-in
-{
+  imports = lib.mapAttrsToList toImport
+    (lib.filterAttrs filterCaches (builtins.readDir folder));
+in {
   inherit imports;
-  nix.binaryCaches = [ "https://cache.nixos.org/" ];
+  nix.settings.substituters = [ "https://cache.nixos.org/" ];
 }

modules/cachix/nix-community.nix

@@ -1,9 +1,7 @@
 {
-  nix = {
-    binaryCaches = [
-      "https://nix-community.cachix.org"
-    ];
-    binaryCachePublicKeys = [
+  nix.settings = {
+    substituters = [ "https://nix-community.cachix.org" ];
+    trusted-public-keys = [
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
     ];
   };