Unified home and system modules!

hosts/reykjavik/default.nix

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+{ config, pkgs, lib, ... }:
+
+{
+  imports = [
+    ./hardware.nix
+    ./nvidia.nix
+  ];
+
+  # - Basic --------------------------------------
+
+  user.name = "marc";
+  user.shell = pkgs.zsh;
+  networking.hostName = "reykjavik";
+
+  # - Bootloader ---------------------------------
+
+  boot.loader.systemd-boot.enable = true;
+
+  # - Modules ------------------------------------
+
+  samfelag.modules = {
+    # - Common -----------------------------------
+    # See modules/common.nix for common packages installed
+
+    # - System -----------------------------------
+    system.bluetooth.enable = true;
+
+    # - Desktop ----------------------------------
+    desktop = {
+      enable = true;
+      laptop = true;
+
+    };
+
+    # - Editors and development ------------------
+    editors.emacs.enable = true;
+
+    dev.git.userName = "marc";
+    dev.git.userEmail = "marc@sastre.cat";
+
+    # - Other apps -------------------------------
+    app.spotify.enable = true;
+
+    # - Gaming -----------------------------------
+    gaming.lutris.enable = true;
+    gaming.steam.enable = true;
+    app.discord.enable = true;
+  };
+
+}

hosts/reykjavik/hardware.nix

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+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
+
+  boot = {
+    initrd = {
+      availableKernelModules = [ "xhci_pci" "thunderbolt" "ahci" "nvme" "usb_storage" "usbhid" "sd_mod" ];
+      kernelModules = [ ];
+    };
+    kernelModules = [ "kvm-intel" ];
+    extraModulePackages = [ ];
+  };
+
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-label/nixos";
+      fsType = "ext4";
+    };
+
+    "/boot" = {
+      device = "/dev/disk/by-label/BOOT";
+      fsType = "vfat";
+    };
+  };
+
+  swapDevices = [
+    { device = "/dev/disk/by-label/swap"; }
+  ];
+
+  networking = {
+    useDHCP = lib.mkDefault true;
+    interfaces = {
+      enp92s0.useDHCP = lib.mkDefault true;
+      wlp0s20f3.useDHCP = lib.mkDefault true;
+    };
+  };
+
+  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

hosts/reykjavik/nvidia.nix

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+{ 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 "$@"
+  '';
+in
+{
+  environment.systemPackages = [ nvidia-offload ];
+
+  services.xserver.videoDrivers = [ "nvidia" ];
+
+  hardware.opengl.enable = true;
+  hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.stable;
+
+  hardware.nvidia.prime = {
+    offload.enable = true;
+
+    # Bus ID of the Intel GPU. You can find it using lspci, either under 3D or VGA
+    intelBusId = "PCI:0:2:0";
+
+    # Bus ID of the NVIDIA GPU. You can find it using lspci, either under 3D or VGA
+    nvidiaBusId = "PCI:1:0:0";
+  };
+}

hosts/reykjavik/readme.org

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+* Reykjavik
+Portàtil Lenovo Legion 5 15ITH6H