system: fix warnings about renamed nix settings

cachix.nix

@@ -9,6 +9,6 @@ let
   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/"];
 }
-    
+    

cachix/nix-community.nix

@@ -1,12 +1,12 @@
 
 {
-  nix = {
-    binaryCaches = [
+  nix.settings = {
+    substituters = [
       "https://nix-community.cachix.org"
     ];
-    binaryCachePublicKeys = [
+    trusted-public-keys = [
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
     ];
   };
 }
-    
+    

cachix/nrdxp.nix

@@ -1,12 +1,12 @@
 
 {
-  nix = {
-    binaryCaches = [
+  nix.settings = {
+    substituters = [
       "https://nrdxp.cachix.org"
     ];
-    binaryCachePublicKeys = [
+    trusted-public-keys = [
       "nrdxp.cachix.org-1:Fc5PSqY2Jm1TrWfm88l6cvGWwz3s93c6IOifQWnhNW4="
     ];
   };
 }
-    
+    

configuration.nix

@@ -23,7 +23,7 @@
     extraOptions = ''
       experimental-features = nix-command flakes
     '';
-    autoOptimiseStore = true;
+    settings.auto-optimise-store = true;
     gc = {
       automatic = true;
       dates = "Saturday";