added remote builders and virtualisation

configuration.nix

@@ -8,6 +8,7 @@
       ./application-configuration.nix
       ./software-development-configuration.nix
       ./school-configuration.nix
+      ./virtualisation-configuration.nix
     ];
 
   # Enable networking and bluetooth
@@ -92,7 +93,7 @@
   users.users.caleb = {
     isNormalUser = true;
     description = "caleb";
-    extraGroups = [ "networkmanager" "wheel" "usrp" ];
+    extraGroups = [ "networkmanager" "wheel" ];
     hashedPassword = "$y$j9T$v6EDyPW8C/K.Th4xg8MHL/$tA67k6U0kLtafTNNW2DM7j.xObjPSaZFQ4e/beBX7g2";
     packages = with pkgs;
       [
@@ -143,15 +144,32 @@
   services.printing.drivers = [ pkgs.brlaser ];
 
   # remote build
-  nix.buildMachines = [{
+  nix.buildMachines = [
+    {
+      hostName = "talos";
+      system = "x86_64-linux";
+      protocol = "ssh-ng";
+      speedFactor = 4;
+      supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
+      mandatoryFeatures = [ ];
+    }
+    {
       hostName = "january";
       system = "x86_64-linux";
       protocol = "ssh-ng";
-    maxJobs = 1;
+      speedFactor = 3;
+      supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
+      mandatoryFeatures = [ ];
+    }
+    {
+      hostName = "pubnix";
+      system = "x86_64-linux";
+      protocol = "ssh-ng";
       speedFactor = 2;
       supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
       mandatoryFeatures = [ ];
-  }];
+    }
+  ];
   nix.distributedBuilds = true;
   # optional, useful when the builder has a faster internet connection than yours
   nix.extraOptions = ''