system folder

system/default.nix

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+{ config, pkgs, ... }:
+
+{
+  imports =
+    [
+      ./interception-tools.nix
+    ];
+
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  networking.networkmanager.enable = true;
+
+  time.timeZone = "Europe/Berlin";
+
+  sound.enable = true;
+  hardware.pulseaudio.enable = true;
+
+  users.users.till = {
+    isNormalUser = true;
+    extraGroups = [
+      "wheel"
+      "networkmanager"
+    ];
+    packages = with pkgs; [];
+    shell = pkgs.fish;
+  };
+
+  environment.systemPackages = with pkgs; [
+    neovim
+    wget
+    git
+    foot
+    wofi
+    pipewire
+  ];
+
+  fonts.fonts = with pkgs; [
+    jetbrains-mono
+  ];
+
+  services = {
+    dbus.enable = true;
+    openssh.enable = true;
+    printing.enable = true;
+  };
+
+
+  system.stateVersion = "22.11";
+}

system/hardware-romulus.nix

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+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "usb_storage" "sd_mod" "sdhci_pci" "rtsx_pci_sdmmc" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/d9731b0f-57a1-42ba-b9bd-92e225df5bc2";
+      fsType = "btrfs";
+      options = [ "subvol=root" "compress=zstd" ];
+    };
+
+  boot.initrd.luks.devices."cryptroot".device = "/dev/disk/by-uuid/d1bb3d19-d95f-4486-8350-2f3a5b473881";
+
+  fileSystems."/swap" =
+    { device = "/dev/disk/by-uuid/d9731b0f-57a1-42ba-b9bd-92e225df5bc2";
+      fsType = "btrfs";
+      options = [ "subvol=swap" ];
+    };
+
+  fileSystems."/home" =
+    { device = "/dev/disk/by-uuid/d9731b0f-57a1-42ba-b9bd-92e225df5bc2";
+      fsType = "btrfs";
+      options = [ "subvol=home" "compress=zstd" ];
+    };
+
+  fileSystems."/nix" =
+    { device = "/dev/disk/by-uuid/d9731b0f-57a1-42ba-b9bd-92e225df5bc2";
+      fsType = "btrfs";
+      options = [ "subvol=nix" "noatime" "compress=zstd" ];
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/EB36-69BF";
+      fsType = "vfat";
+    };
+
+  swapDevices = [ { device = "/swap/swapfile"; } ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.wlp2s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

system/interception-tools.nix

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+{ config, pkgs, ... }:
+
+{
+  environment.etc = {
+    "interception/dual-function-keys/capslock.yaml".text = ''
+      MAPPINGS:
+        - KEY: KEY_CAPSLOCK
+          TAP: KEY_ESC
+          HOLD: KEY_LEFTCTRL
+    '';
+  };
+
+  services.interception-tools = {
+    enable = true;
+    plugins = [ pkgs.interception-tools-plugins.dual-function-keys ];
+    udevmonConfig = ''
+      - JOB: "${pkgs.interception-tools}/bin/intercept -g $DEVNODE | ${pkgs.interception-tools-plugins.dual-function-keys}/bin/dual-function-keys -c /etc/interception/dual-function-keys/capslock.yaml | ${pkgs.interception-tools}/bin/uinput -d $DEVNODE"
+        DEVICE:
+          EVENTS:
+            EV_KEY: [ KEY_CAPSLOCK ]
+    '';
+  };
+}