meta: Replace go-thumbnailer with nixpkgs version

Now there is no need for a packages directory since all the packages I
maintain are upstreamed.

assets/go.thumbnailer

@@ -1,3 +0,0 @@
-[Thumbnailer Entry]
-Exec=@out@/bin/go-thumbnailer %s %i %o
-MimeType=inode/directory

flake.lock

@@ -147,6 +147,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-go-thumbnailer": {
+      "locked": {
+        "lastModified": 1687268527,
+        "narHash": "sha256-ueJuEep01cQHUy9rQRVWDTkfuHU+yUQ5w2Bb69yeCrI=",
+        "owner": "donovanglover",
+        "repo": "nixpkgs",
+        "rev": "72fc3e9404fe2e3c0360619955dbe626974f445e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "donovanglover",
+        "ref": "go-thumbnailer",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-hyprland-autoname-workspaces": {
       "locked": {
         "lastModified": 1687166409,
@@ -220,6 +236,7 @@
         "nix-gaming": "nix-gaming",
         "nixpkgs": "nixpkgs_2",
         "nixpkgs-crystalline": "nixpkgs-crystalline",
+        "nixpkgs-go-thumbnailer": "nixpkgs-go-thumbnailer",
         "nixpkgs-hyprland-autoname-workspaces": "nixpkgs-hyprland-autoname-workspaces",
         "nixpkgs-srb2": "nixpkgs-srb2",
         "stylix": "stylix"

flake.nix

@@ -18,6 +18,7 @@
     nixpkgs-hyprland-autoname-workspaces.url = "github:donovanglover/nixpkgs/hyprland-autoname-workspaces";
     nixpkgs-srb2.url = "github:donovanglover/nixpkgs/srb2";
     nixpkgs-crystalline.url = "github:donovanglover/nixpkgs/crystalline";
+    nixpkgs-go-thumbnailer.url = "github:donovanglover/nixpkgs/go-thumbnailer";
 
     home-manager = {
       url = "github:nix-community/home-manager/master";

modules/thunar.nix

@@ -6,7 +6,6 @@
   environment.systemPackages = with pkgs; [
     xfce.exo # Open with kitty support
     glib
-    (pkgs.callPackage ../packages/go-thumbnailer.nix { })
   ];
 
   services.gvfs.enable = true; # Trash support

packages/go-thumbnailer.nix

@@ -1,40 +0,0 @@
-{ lib
-, buildGoModule
-, fetchFromGitHub
-, pkg-config
-, vips
-}:
-
-buildGoModule rec {
-  pname = "go-thumbnailer";
-  version = "0.1.0";
-
-  src = fetchFromGitHub {
-    owner = "donovanglover";
-    repo = pname;
-    rev = version;
-    sha256 = "sha256-sgd5kNnDXcSesGT+OignZ+APjNSxSP0Z60dr8cWO6sU=";
-  };
-
-  buildInputs = [
-    vips
-  ];
-
-  nativeBuildInputs = [
-    pkg-config
-  ];
-
-  vendorSha256 = "sha256-4zgsoExdhEqvycGerNVxZ6LnjeRRO+f6DhJdINR5ZyI=";
-
-  postInstall = ''
-    mkdir -p $out/share/thumbnailers
-    substituteAll ${../assets/go.thumbnailer} $out/share/thumbnailers/go.thumbnailer
-  '';
-
-  meta = with lib; {
-    description = "A cover thumbnailer written in Go for performance and reliability";
-    homepage = "https://github.com/donovanglover/go-thumbnailer";
-    license = licenses.mit;
-    maintainers = with maintainers; [ donovanglover ];
-  };
-}

src/main.nix

@@ -5,6 +5,7 @@
 , nixpkgs-hyprland-autoname-workspaces
 , nixpkgs-srb2
 , nixpkgs-crystalline
+, nixpkgs-go-thumbnailer
 , ...
 }:
 
@@ -108,6 +109,7 @@ let VARIABLES = import ./variables.nix; in {
     nixpkgs-hyprland-autoname-workspaces.legacyPackages.${VARIABLES.system}.hyprland-autoname-workspaces
     nixpkgs-srb2.legacyPackages.${VARIABLES.system}.srb2
     nixpkgs-crystalline.legacyPackages.${VARIABLES.system}.crystalline
+    nixpkgs-go-thumbnailer.legacyPackages.${VARIABLES.system}.go-thumbnailer
   ];
 
   nixpkgs.config.allowUnfreePredicate = pkg: