nixos,anti-feature: deny non-source packages

nixos/packages/anti-feature.nix

@@ -0,0 +1,36 @@
+{lib, ...}: {
+  nixpkgs.config = {
+    allowBroken = false;
+    allowUnsupportedSystem = false;
+
+    allowNonSource = false;
+    allowNonSourcePredicate = pkg:
+      builtins.elem (lib.getName pkg) [
+        "vscodium"
+        "spotify"
+        "adoptopenjdk-hotspot-bin"
+        "osu-lazer-bin-2023.1026.0"
+        "protonup-qt-2.8.2"
+        "cef-binary"
+        "virtualbox"
+        "virtualbox-modules"
+        "open-watcom-bin"
+        "open-watcom-bin-unwrapped"
+        "sof-firmware"
+      ];
+
+    allowUnfree = false;
+    allowUnfreePredicate = pkg:
+      builtins.elem (lib.getName pkg) [
+        "nvidia-x11"
+        #"nvidia-settings"
+        #"nvidia-persistenced"
+        #"xow_dongle-firmware"
+        #"facetimehd-firmware"
+        "osu-lazer-bin-2023.1026.0"
+        "spotify"
+        "steam"
+        "steam-original"
+      ];
+  };
+}

nixos/packages/default.nix

@@ -4,6 +4,6 @@
 
     # TODO: should this be considered user-specific?
     ./overlays
-    ./unfree
+    ./anti-feature.nix
   ];
 }

nixos/packages/unfree/default.nix

@@ -1,5 +0,0 @@
-{...}: {
-  imports = [
-    ./unfree.nix
-  ];
-}

nixos/packages/unfree/unfree.nix

@@ -1,20 +0,0 @@
-{lib, ...}: {
-  nixpkgs.config.allowUnfreePredicate = pkg:
-    builtins.elem (lib.getName pkg) [
-      "nvidia-x11" # ../hardware/gpu/nvidia.nix
-      #"nvidia-settings"
-      #"nvidia-persistenced"
-      "xow_dongle-firmware" # ../hardware/accessories/xbox.nix
-      "facetimehd-firmware" # ../hardware/hardwares/imac-2017.nix
-
-      "osu-lazer-bin-2023.1026.0" # what?
-      "spotify"
-      "steam"
-      "steam-original"
-      #"discord"
-      #"google-chrome"
-      #"lunar-client"
-      #"microsoft-edge-stable"
-      #"qq"
-    ];
-}