Initial NixOS flake: Hyprland (end-4 illogical-impulse), NVIDIA, gaming, dev tools

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01C5ydBQk68JYw8HXzUDLAyV

modules/core.nix

@@ -0,0 +1,47 @@
+{ pkgs, ... }:
+
+{
+  nix.settings = {
+    experimental-features = [ "nix-command" "flakes" ];
+    auto-optimise-store = true;
+    trusted-users = [ "root" "@wheel" ];
+  };
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 14d";
+  };
+
+  nixpkgs.config.allowUnfree = true;
+
+  networking.networkmanager.enable = true; # required by illogical-flake
+
+  hardware.bluetooth = {
+    enable = true;
+    powerOnBoot = true;
+  };
+
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+  };
+  security.rtkit.enable = true;
+
+  services.fstrim.enable = true;
+
+  # Read the Windows/data partitions when needed
+  boot.supportedFilesystems = [ "ntfs" ];
+
+  environment.systemPackages = with pkgs; [
+    wget
+    curl
+    file
+    unzip
+    p7zip
+    pciutils
+    usbutils
+    efibootmgr # check/fix boot order so rEFInd stays first
+  ];
+}

modules/desktop.nix

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+{ pkgs, ... }:
+
+{
+  # System-side requirements of illogical-flake (the HM module does the rest)
+  programs.hyprland.enable = true;
+  services.geoclue2.enable = true; # QtPositioning — weather / night light widgets
+
+  services.displayManager.sddm = {
+    enable = true;
+    wayland.enable = true;
+  };
+
+  xdg.portal.extraPortals = [ pkgs.xdg-desktop-portal-gtk ]; # file pickers etc.
+
+  security.polkit.enable = true;
+  programs.dconf.enable = true;
+  services.gvfs.enable = true;
+  services.udisks2.enable = true;
+  services.upower.enable = true;
+
+  fonts.packages = with pkgs; [
+    # named by the illogical-flake README
+    rubik
+    nerd-fonts.ubuntu
+    nerd-fonts.jetbrains-mono
+    material-symbols
+    noto-fonts
+    noto-fonts-cjk-sans
+    noto-fonts-color-emoji
+  ];
+}

modules/gaming.nix

@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+
+{
+  programs.steam = {
+    enable = true;
+    remotePlay.openFirewall = true;
+    gamescopeSession.enable = true; # "Steam (gamescope)" session in SDDM
+    extraCompatPackages = [ pkgs.proton-ge-bin ];
+  };
+
+  programs.gamemode.enable = true;
+  programs.gamescope.enable = true;
+  # programs.gamescope.capSysNice = true; # left off — known to break gamescope under Steam
+
+  environment.systemPackages = with pkgs; [
+    mangohud
+    protonup-qt
+  ];
+}

modules/nvidia.nix

@@ -0,0 +1,30 @@
+{ config, ... }:
+
+{
+  services.xserver.videoDrivers = [ "nvidia" ];
+
+  hardware.graphics = {
+    enable = true;
+    enable32Bit = true; # Steam/Proton
+  };
+
+  hardware.nvidia = {
+    modesetting.enable = true; # nvidia-drm.modeset=1 — mandatory for Wayland
+    open = true; # RTX 3080 (Ampere): NVIDIA-recommended on driver >= 560
+    nvidiaSettings = true;
+    powerManagement.enable = true; # preserves VRAM across suspend — avoids Wayland resume corruption
+    powerManagement.finegrained = false; # desktop GPU
+    package = config.boot.kernelPackages.nvidiaPackages.stable;
+  };
+
+  boot.kernelParams = [ "nvidia_drm.fbdev=1" ];
+
+  environment.sessionVariables = {
+    LIBVA_DRIVER_NAME = "nvidia";
+    NVD_BACKEND = "direct";
+    ELECTRON_OZONE_PLATFORM_HINT = "auto";
+    # Fallbacks — only if symptoms appear (should be unnecessary with driver 560+ / explicit sync):
+    # WLR_NO_HARDWARE_CURSORS = "1";          # invisible/glitchy cursor
+    # __GLX_VENDOR_LIBRARY_NAME = "nvidia";   # Xwayland picks wrong GL vendor
+  };
+}