add speed factor

nixos/boxes/foureighty/configuration.nix

@@ -30,15 +30,12 @@
     package = pkgs.fprintd-thinkpad;
   };
 
-  hardware.nvidiaOptimus.disable = true;
-  hardware.nvidia.prime.sync.enable = false;
-  hardware.bumblebee.enable = false;
-
   imports = [
     /etc/nixos/hardware-configuration.nix
     ../../boot.nix
     ../../common.nix
     ../../gfx-intel.nix
+    ../../gfx-nvidia-optimus.nix
     ../../zerotier.nix
     ../../distributed-builds.nix
     ../../virtualbox.nix

nixos/cli.nix

@@ -1,6 +1,7 @@
 { config, pkgs, ... }:
 {
   home.packages = with pkgs; [
+    genpass
     gdb lldb
     wget git gnupg curl tmux htop atop pciutils powertop ripgrep-all fd dnsutils du-dust
     ( pass.withExtensions (ext: [ ext.pass-otp ext.pass-import ext.pass-genphrase ext.pass-audit ext.pass-update ]))

nixos/distributed-builds.nix

@@ -11,6 +11,7 @@
       sshKey = "/home/cyryl/.ssh/id_ed25519";
       system = "x86_64-linux";
       maxJobs = 2;
+      speedFactor = 2;
       supportedFeatures = [ "kvm" ];
       mandatoryFeatures = [ ];
     }
@@ -20,6 +21,7 @@
       sshKey = "/home/cyryl/.ssh/id_ed25519";
       system = "x86_64-linux";
       maxJobs = 2;
+      speedFactor = 1;
       supportedFeatures = [ ];
       mandatoryFeatures = [ ];
     }

nixos/gfx-nvidia-optimus.nix

@@ -0,0 +1,21 @@
+{ config, pkgs, ... }:
+let
+  nvidia-offload = pkgs.writeShellScriptBin "nvidia-offload" ''
+    export __NV_PRIME_RENDER_OFFLOAD=1
+    export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
+    export __GLX_VENDOR_LIBRARY_NAME=nvidia
+    export __VK_LAYER_NV_optimus=NVIDIA_only
+    exec -a "$0" "$@"
+  '';
+in
+  {
+    environment.systemPackages = [ nvidia-offload ];
+
+    services.xserver.videoDrivers = [ "nvidia" ];
+    hardware.nvidia.prime.offload.enable = true;
+    hardware.nvidia.prime = {
+      intelBusId = "PCI:0:2:0";
+      nvidiaBusId = "PCI:1:0:0";
+    };
+  }
+