common/nix: flesh out

base/nix.nix

@@ -1,17 +1,30 @@
 { inputs, ... }:
 {
-  nix.gc.automatic = true;
+  nix = {
-  nix.gc.options = "--delete-older-than 2d";
+    gc = {
-  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+      automatic = true;
+      options = "--delete-older-than 2d";
+    };
 
-  /* This makes commandline tools like
+    settings = {
-  ** nix run nixpkgs#hello
+      allow-dirty = true;
-  ** and nix-shell -p hello
+      auto-optimise-store = true;
-  ** use the same channel the system
+      builders-use-substitutes = true;
-  ** was built with
+      experimental-features = [ "nix-command" "flakes" ];
-  */
+      log-lines = 50;
-  nix.registry = {
+      use-xdg-base-directories = true;
-    nixpkgs.flake = inputs.nixpkgs;
+    };
+
+    /* This makes commandline tools like
+    ** nix run nixpkgs#hello
+    ** and nix-shell -p hello
+    ** use the same channel the system
+    ** was built with
+    */
+    registry = {
+      "nixpkgs".flake = inputs.nixpkgs;
+      "pvv-nix".flake = inputs.self;
+    };
+    nixPath = [ "nixpkgs=${inputs.nixpkgs}" ];
   };
-  nix.nixPath = [ "nixpkgs=${inputs.nixpkgs}" ];
 }