Add new system

hosts/diphda/hardware-configuration.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 + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "uhci_hcd" "ehci_pci" "ahci" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/0dfd896f-a313-4a43-a171-3d1157a01c02";
+      fsType = "btrfs";
+      options = [ "subvol=root" ];
+    };
+
+  fileSystems."/home" =
+    { device = "/dev/disk/by-uuid/0dfd896f-a313-4a43-a171-3d1157a01c02";
+      fsType = "btrfs";
+      options = [ "subvol=home" ];
+    };
+
+  fileSystems."/nix" =
+    { device = "/dev/disk/by-uuid/0dfd896f-a313-4a43-a171-3d1157a01c02";
+      fsType = "btrfs";
+      options = [ "subvol=nix" ];
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/1925-D969";
+      fsType = "vfat";
+      options = [ "fmask=0022" "dmask=0022" ];
+    };
+
+  swapDevices = [ ];
+
+  # 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.enp6s18.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/diphda/system.nix

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+# Edit this configuration file to define what should be installed on
+# your system. Help is available in the configuration.nix(5) man page, on
+# https://search.nixos.org/options and in the NixOS manual (`nixos-help`).
+
+{ 
+    lib,
+    config,
+    pkgs,
+    localPackages,
+    ...
+}: {
+
+    nix = {
+        settings = {
+            experimental-features = "nix-command flakes";
+        };
+    };
+
+    # Use the systemd-boot EFI boot loader.
+    boot.loader.systemd-boot.enable = true;
+    boot.loader.efi.canTouchEfiVariables = true;
+
+    fileSystems = {
+        "/".options = [ "compress=zstd" ];
+        "/home".options = [ "compress=zstd" ];
+        "/nix".options = [ "compress=zstd" "noatime" ];
+    };
+
+    # Set your time zone.
+    time.timeZone = "America/Chicago";
+
+    # Select internationalisation properties.
+    i18n.defaultLocale = "en_US.UTF-8";
+
+    # Define a user account.
+    users.users.eesim = {
+        isNormalUser = true;
+        extraGroups = [ "wheel" ];
+        shell = pkgs.fish;
+    };
+
+    system.stateVersion = "23.11";
+
+}
+