adjusted some config for flakes compatibility

machines/desktop.nix

@@ -8,7 +8,6 @@
   machine = {
       username = "thilo";
       isGeneric = false;
-      nixPackage = pkgs.nixUnstable;
       isGnome = false;
       noiseSuppression.enable = true;
       isGraphical = true;

modules/machine.nix

@@ -32,11 +32,6 @@ with lib;
         default = false;
         description = "Whether the system is generic or not";
       };
-      nixPackage = mkOption {
-        type = types.package;
-        default = pkgs.nixUnstable;
-        description = "The version of nix to use";
-      };
       isGraphical = mkOption {
         type = types.bool;
         default = false;
@@ -56,7 +51,6 @@ with lib;
   };
 
   config = {
-    nixpkgs.config.allowUnfree = true;
     news.display = "silent";
     targets.genericLinux.enable = config.machine.isGeneric;
 
@@ -130,16 +124,12 @@ with lib;
     programs.home-manager.enable = true;
 
     nix = {
-      package = config.machine.nixPackage;
+      package = mkDefault pkgs.nixUnstable;
       extraOptions = ''
         experimental-features = nix-command flakes
       '';
     };
 
-    nixpkgs.config.permittedInsecurePackages = [
-      "electron-24.8.6"
-    ];
-
     gtk = {
       enable = config.machine.isGnome;
       theme = {
@@ -149,3 +139,4 @@ with lib;
     };
   };
 }
+

modules/packages.nix

@@ -6,7 +6,7 @@ with lib;
     nixpkgs.overlays = [
       (final: prev: {
         quickemu = prev.quickemu.overrideAttrs (old: {
-          patches = (old.patches or []) ++ [
+          patches = (old.patches or [ ]) ++ [
             ./../patches/quickemu.patch
           ];
         });
@@ -56,8 +56,6 @@ with lib;
       (callPackage ./../pkgs/toggl-time-grouper/package.nix {
         inherit lib;
       })
-      (import (fetchTarball
-        "https://github.com/cachix/devenv/archive/v0.6.2.tar.gz")).default
       nixpkgs-fmt
       toolbox
       distrobox
@@ -67,6 +65,7 @@ with lib;
       pulumi
       kubectl
       pulumiPackages.pulumi-language-nodejs
+      ncdu
     ] ++ (if config.machine.isGraphical then [
       (pkgs.nerdfonts.override {
         fonts = [ "JetBrainsMono" "FiraCode" "FiraMono" ];
@@ -83,12 +82,12 @@ with lib;
       spotify
       (lutris.override {
         extraLibraries = pkgs: [
-         gnome3.adwaita-icon-theme
+          gnome3.adwaita-icon-theme
         ];
         extraPkgs = pkgs: [
           wineWowPackages.full
           winetricks
-	  gnome3.adwaita-icon-theme
+          gnome3.adwaita-icon-theme
         ];
       })
       bottles