[chore] flake.lock: update inputs

Flake lock file updates:

```
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/8c50662509100d53229d4be607f1a3a31157fa12' (2024-07-27)
  → 'github:NixOS/nixpkgs/cf05eeada35e122770c5c14add958790fcfcbef5' (2024-07-30)
• Updated input 'nixvim':
    'github:nix-community/nixvim/2415edc0cb749bf81c9b142138c2bb705514f6cc' (2024-07-29)
  → 'github:nix-community/nixvim/7c39d77b9f1fbcbd8f2a575c4f2948dd54efc5c1' (2024-08-01)
• Updated input 'nixvim/treefmt-nix':
    'github:numtide/treefmt-nix/8db8970be1fb8be9c845af7ebec53b699fe7e009' (2024-07-23)
  → 'github:numtide/treefmt-nix/768acdb06968e53aa1ee8de207fd955335c754b7' (2024-07-30)
• Updated input 'unstable':
    'github:NixOS/nixpkgs/b73c2221a46c13557b1b3be9c2070cc42cf01eb3' (2024-07-27)
  → 'github:NixOS/nixpkgs/9f918d616c5321ad374ae6cb5ea89c9e04bf3e58' (2024-07-31)
```

flake.lock

@@ -350,11 +350,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1722087241,
-        "narHash": "sha256-2ShmEaFi0kJVOEEu5gmlykN5dwjWYWYUJmlRTvZQRpU=",
+        "lastModified": 1722372011,
+        "narHash": "sha256-B2xRiC3NEJy/82ugtareBkRqEkPGpMyjaLxaR8LBxNs=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "8c50662509100d53229d4be607f1a3a31157fa12",
+        "rev": "cf05eeada35e122770c5c14add958790fcfcbef5",
         "type": "github"
       },
       "original": {
@@ -363,22 +363,6 @@
         "type": "indirect"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1722062969,
-        "narHash": "sha256-QOS0ykELUmPbrrUGmegAUlpmUFznDQeR4q7rFhl8eQg=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "b73c2221a46c13557b1b3be9c2070cc42cf01eb3",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nixvim": {
       "inputs": {
         "devshell": "devshell",
@@ -399,11 +383,11 @@
         "treefmt-nix": "treefmt-nix"
       },
       "locked": {
-        "lastModified": 1722232048,
-        "narHash": "sha256-TjBk/EECLYfPscxOW9yWEuoI4mzoYOok/qMiod/Xx8M=",
+        "lastModified": 1722531900,
+        "narHash": "sha256-COtoy+Y/j2QLX818mRI7BweRJOltf0bndxbps/eoH0s=",
         "owner": "nix-community",
         "repo": "nixvim",
-        "rev": "2415edc0cb749bf81c9b142138c2bb705514f6cc",
+        "rev": "7c39d77b9f1fbcbd8f2a575c4f2948dd54efc5c1",
         "type": "github"
       },
       "original": {
@@ -418,14 +402,16 @@
           "lix-module",
           "flake-utils"
         ],
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": [
+          "nixpkgs"
+        ]
       },
       "locked": {
-        "lastModified": 1722144272,
-        "narHash": "sha256-olZbfaEdd+zNPuuyYcYGaRzymA9rOmth8yXOlVm+LUs=",
+        "lastModified": 1722493084,
+        "narHash": "sha256-ktjl908zZKWcGdMyz6kX1kHSg7LFFGPYBvTi9FgQleM=",
         "owner": "NuschtOS",
         "repo": "search",
-        "rev": "16565307c267ec219c2b5d3494ba66df08e7d403",
+        "rev": "3f5abffa5f28b4ac3c9212c81c5e8d2d22876071",
         "type": "github"
       },
       "original": {
@@ -501,11 +487,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1721769617,
-        "narHash": "sha256-6Pqa0bi5nV74IZcENKYRToRNM5obo1EQ+3ihtunJ014=",
+        "lastModified": 1722330636,
+        "narHash": "sha256-uru7JzOa33YlSRwf9sfXpJG+UAV+bnBEYMjrzKrQZFw=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "8db8970be1fb8be9c845af7ebec53b699fe7e009",
+        "rev": "768acdb06968e53aa1ee8de207fd955335c754b7",
         "type": "github"
       },
       "original": {
@@ -516,11 +502,11 @@
     },
     "unstable": {
       "locked": {
-        "lastModified": 1722062969,
-        "narHash": "sha256-QOS0ykELUmPbrrUGmegAUlpmUFznDQeR4q7rFhl8eQg=",
+        "lastModified": 1722421184,
+        "narHash": "sha256-/DJBI6trCeVnasdjUo9pbnodCLZcFqnVZiLUfqLH4jA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b73c2221a46c13557b1b3be9c2070cc42cf01eb3",
+        "rev": "9f918d616c5321ad374ae6cb5ea89c9e04bf3e58",
         "type": "github"
       },
       "original": {

flake.nix

@@ -33,7 +33,10 @@
         nix-darwin.follows = ""; # disable MacOS stuff
         home-manager.follows = "home-manager";
         flake-compat.follows = "stylix/flake-compat";
-        nuschtosSearch.inputs.flake-utils.follows = "lix-module/flake-utils";
+        nuschtosSearch.inputs = {
+          flake-utils.follows = "lix-module/flake-utils";
+          nixpkgs.follows = "nixpkgs";
+        };
       };
     };
     # For deduplication