pkgs#unstable: remove specialArgs

The `specialArgs` defined in `hosts` has kept some modules from working
in external flakes. Instead, we simply enumerate packages in `hosts`
which should be pulled from `unstablePkgs`.

hosts/default.nix

@@ -12,18 +12,6 @@ let
     lib.nixosSystem {
       inherit system;
 
-      specialArgs = {
-        inherit unstablePkgs;
-
-        flakes = {
-          nixpkgs = nixpkgs;
-          master = inputs.unstable;
-          nixflk = self;
-        };
-
-        usr = { inherit utils; };
-      };
-
       modules = let
         inherit (home.nixosModules) home-manager;
 
@@ -38,6 +26,22 @@ let
           ];
 
           nixpkgs = { inherit pkgs; };
+
+          nix.registry = {
+            nixpkgs.flake = nixpkgs;
+            nixflk.flake = self;
+            master.flake = inputs.unstable;
+          };
+        };
+
+        unstables = {
+          systemd.package = unstablePkgs.systemd;
+          nixpkgs.overlays = [
+            (final: prev:
+              with unstablePkgs; {
+                inherit starship element-desktop discord signal-desktop mpv;
+              })
+          ];
         };
 
         local = import "${toString ./.}/${hostName}.nix";
@@ -46,7 +50,7 @@ let
         flakeModules =
           attrValues (removeAttrs self.nixosModules [ "profiles" ]);
 
-      in flakeModules ++ [ core global local home-manager ];
+      in flakeModules ++ [ core global local home-manager unstables ];
 
     };
 

profiles/core.nix

@@ -1,4 +1,4 @@
-{ config, lib, pkgs, unstablePkgs, flakes, ... }:
+{ config, lib, pkgs, ... }:
 let inherit (lib) fileContents;
 
 in {
@@ -6,12 +6,6 @@ in {
 
   nix.systemFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
 
-  nix.registry = with flakes; {
-    nixpkgs.flake = nixpkgs;
-    nixflk.flake = nixflk;
-    master.flake = master;
-  };
-
   imports = [ ../local/locale.nix ];
 
   environment = {
@@ -126,8 +120,6 @@ in {
 
   };
 
-  systemd.package = unstablePkgs.systemd;
-
   services.earlyoom.enable = true;
 
   users.mutableUsers = false;

profiles/games/default.nix

@@ -1,6 +1,6 @@
-{ unstablePkgs, ... }: {
+{ pkgs, ... }: {
   imports = [ ../graphical ./udev.nix ];
-  environment.systemPackages = with unstablePkgs; [
+  environment.systemPackages = with pkgs; [
     retroarchBare
     steam-run
     pcsx2
@@ -15,10 +15,7 @@
   services.xserver.libinput.disableWhileTyping = false;
 
   # Launch steam from display managers
-  services.xserver.windowManager.steam = {
-    enable = true;
-    package = unstablePkgs.steam;
-  };
+  services.xserver.windowManager.steam = { enable = true; };
 
   # 32-bit support needed for steam
   hardware.opengl.driSupport32Bit = true;

profiles/graphical/qutebrowser/default.nix

@@ -1,11 +1,10 @@
-{ unstablePkgs, ... }:
+{ pkgs, ... }:
 let inherit (builtins) readFile;
 in {
   sound.enable = true;
 
   environment = {
-    etc."xdg/qutebrowser/config.py".text =
-      let mpv = "${unstablePkgs.mpv}/bin/mpv";
+    etc."xdg/qutebrowser/config.py".text = let mpv = "${pkgs.mpv}/bin/mpv";
     in ''
       ${readFile ./config.py}
 
@@ -15,6 +14,6 @@ in {
 
     sessionVariables.BROWSER = "qute";
 
-    systemPackages = with unstablePkgs; [ qute qutebrowser mpv youtubeDL ];
+    systemPackages = with pkgs; [ qute qutebrowser mpv youtubeDL ];
   };
 }

profiles/im/default.nix

@@ -1,5 +1,5 @@
-{ unstablePkgs, ... }: {
-  environment.systemPackages = with unstablePkgs; [
+{ pkgs, ... }: {
+  environment.systemPackages = with pkgs; [
     discord
     element-desktop
     signal-desktop