feat: rename system and update to latest syntax

flake.nix

@@ -183,7 +183,7 @@
         isServer = true;
       }
       {
-        name = "Uttarayans-MacBook-Pro";
+        name = "kuro";
         system = "aarch64-darwin";
         user = "fs0c131y";
       }

justfile

@@ -2,11 +2,11 @@ set dotenv-load
 
 # clean := `git diff-index --quiet --cached HEAD --`
 [macos]
-install: local
-    darwin-rebuild switch --flake .
+install: 
+    nix run nix-darwin -- switch --flake .
 
 [linux]
-install: local
+install:
 	NIX_BUILD_CORES=0 sudo nixos-rebuild switch --flake .
 
 [macos]
@@ -23,8 +23,6 @@ nix args:
 home:
 	nix --extra-experimental-features "nix-command flakes" run home-manager/master -- switch --flake . --show-trace
 
-local:
-    nix flake update neovim
 
 nvim:
     nix run .#neovim

overlays.nix

@@ -233,7 +233,7 @@ in
     nix-index-db
     shell-scipts
     misc-applications
-    inputs.nur.overlay
+    inputs.nur.overlays.default
     inputs.rust-overlay.overlays.default
     csshacks
   ]