Initial NixOS VM config

configuration.nix

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+{ config, lib, pkgs, ... }:
+{
+  # VM Hardware Configuration
+  boot.loader.grub = {
+    enable = true;
+    device = "/dev/sda";
+    useOSProber = false;
+  };
+
+  # Filesystem — will be generated by nixos-generate-config, but override
+  fileSystems."/" = lib.mkDefault {
+    device = "/dev/disk/by-label/nixos";
+    fsType = "ext4";
+  };
+  fileSystems."/boot" = lib.mkDefault {
+    device = "/dev/disk/by-label/boot";
+    fsType = "vfat";
+  };
+
+  # Network
+  networking = {
+    hostName = "nixos-dev";
+    networkmanager.enable = true;
+    useDHCP = true;
+    firewall = {
+      enable = true;
+      allowedTCPPorts = [ 22 8000 8080 3000 ];
+    };
+  };
+
+  # QEMU Guest Agent (for Proxmox integration)
+  services.qemuGuest.enable = true;
+
+  # SSH
+  services.openssh = {
+    enable = true;
+    settings = {
+      PermitRootLogin = "no";
+      PasswordAuthentication = true;  # change to no after keys deployed
+    };
+  };
+
+  # User configuration
+  users.users.konrad = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" "docker" "networkmanager" ];
+    shell = pkgs.zsh;
+    # Temporary password — change after first login
+    initialPassword = "changeme";
+  };
+
+  # System-wide programs
+  programs = {
+    zsh.enable = true;
+    git.enable = true;
+  };
+
+  # System packages (minimal core)
+  environment.systemPackages = with pkgs; [
+    curl
+    git
+    vim
+    htop
+  ];
+
+  # Docker
+  virtualisation.docker = {
+    enable = true;
+    enableOnBoot = true;
+  };
+
+  # Nix configuration
+  nix = {
+    settings = {
+      experimental-features = [ "nix-command" "flakes" ];
+      auto-optimise-store = true;
+    };
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 7d";
+    };
+  };
+
+  # Allow unfree packages
+  nixpkgs.config.allowUnfree = true;
+
+  # Auto-upgrades
+  system = {
+    stateVersion = "24.11";
+    autoUpgrade = {
+      enable = true;
+      allowReboot = false;
+    };
+  };
+
+  # Enable flakes in this boot configuration
+  boot.kernelPackages = pkgs.linuxPackages_latest;
+}

flake.nix

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+{
+  description = "Konrad's NixOS Dev VM — Proxmox";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, home-manager, ... }: {
+    nixosConfigurations.nixos-dev = nixpkgs.lib.nixosSystem {
+      system = "x86_64-linux";
+      modules = [
+        ./configuration.nix
+        ./hardware-configuration.nix
+        home-manager.nixosModules.home-manager
+        {
+          home-manager = {
+            useGlobalPkgs = true;
+            useUserPackages = true;
+            users.konrad = import ./home.nix;
+            extraSpecialArgs = { inherit nixpkgs; };
+          };
+        }
+      ];
+    };
+
+    homeConfigurations.konrad = home-manager.lib.homeManagerConfiguration {
+      pkgs = nixpkgs.legacyPackages.x86_64-linux;
+      modules = [ ./home.nix ];
+    };
+  };
+}

install.sh

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+#!/bin/bash
+# NixOS Proxmox VM install script — paste into NixOS minimal ISO console
+set -euo pipefail
+
+echo "=== NixOS VM Install ==="
+
+# Partition disk
+parted /dev/sda -- mklabel gpt
+parted /dev/sda -- mkpart primary 512MiB -8GiB
+parted /dev/sda -- mkpart primary linux-swap -8GiB 100%
+parted /dev/sda -- mkpart ESP fat32 1MiB 512MiB
+parted /dev/sda -- set 3 esp on
+
+# Format partitions
+mkfs.ext4 -L nixos /dev/sda1
+mkswap -L swap /dev/sda2
+mkfs.fat -F 32 -n boot /dev/sda3
+
+# Mount
+mount /dev/disk/by-label/nixos /mnt
+mkdir -p /mnt/boot
+mount /dev/disk/by-label/boot /mnt/boot
+swapon /dev/sda2
+
+# Generate hardware config
+nixos-generate-config --root /mnt
+
+# Clone and use our config
+CONFIG_URL="https://gitea.klhoud.com/konrad/nixos-config-raw"
+mkdir -p /mnt/etc/nixos
+
+# Option 1: If config is in a repo, clone it
+# git clone $CONFIG_URL /mnt/etc/nixos/
+# Option 2: The user will have pasted the config — placeholder below
+echo "Place your configuration.nix and flake.nix in /mnt/etc/nixos/"
+
+# Generate fallback hardware config if needed
+nixos-generate-config --root /mnt --show-hardware-config > /mnt/etc/nixos/hardware-configuration.nix
+
+echo "Copy your flake.nix and configuration.nix to /mnt/etc/nixos/"
+echo "then run: nixos-install --flake /mnt/etc/nixos#nixos-dev"