configurations: Add stable nixpkgs for other hosts, use one Arg

configurations/host/flamaster/configuration.nix

@@ -2,7 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ config, lib, pkgs, materusFlake, materusPkgs, ... }:
+{ config, lib, pkgs, materusArg, ... }:
 
 {
   imports =
@@ -115,7 +115,7 @@
     isNormalUser = true;
     description = "Mateusz Słodkowicz";
     extraGroups = [ "networkmanager" "wheel" ];
-    openssh.authorizedKeys.keyFiles = [ (materusFlake.selfPath + /extraFiles/keys/ssh/materus.pub) ];
+    openssh.authorizedKeys.keyFiles = [  ("${materusArg.cfg.path}" + "/extraFiles/keys/ssh/materus.pub") ];
     packages = with pkgs; [
       kate
     ];

configurations/host/flamaster/extraHome.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, materusPkgs, lib, ... }:
+{ config, pkgs, materusArg, lib, ... }:
 {
   home.stateVersion = "23.05";
   home.homeDirectory = "/home/materus";
@@ -15,7 +15,7 @@
 
   home.packages = [
     pkgs.papirus-icon-theme
-    (materusPkgs.polymc.wrap { extraJDKs = [ pkgs.graalvm-ce ]; })
+    (materusArg.pkgs.polymc.wrap { extraJDKs = [ pkgs.graalvm-ce ]; })
   ];
 
 }