Add Nix flake and install docs

README.md

@@ -192,6 +192,47 @@ yay -S wayscriber-bin    # prebuilt binary
 yay -S wayscriber-configurator
 ```
 
+### NixOS / Nix
+
+**Run without installing:**
+```bash
+nix run github:devmobasa/wayscriber
+```
+
+**Install to profile:**
+```bash
+nix profile install github:devmobasa/wayscriber
+# Optional GUI configurator:
+nix profile install github:devmobasa/wayscriber#wayscriber-configurator
+```
+
+**Add to NixOS configuration (flake-based):**
+```nix
+# flake.nix
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    wayscriber.url = "github:devmobasa/wayscriber";
+  };
+
+  outputs = { nixpkgs, wayscriber, ... }: {
+    nixosConfigurations.myhost = nixpkgs.lib.nixosSystem {
+      system = "x86_64-linux";
+      modules = [{
+        environment.systemPackages = [
+          wayscriber.packages.x86_64-linux.default
+        ];
+      }];
+    };
+  };
+}
+```
+
+**Development shell:**
+```bash
+nix develop github:devmobasa/wayscriber
+```
+
 ### From Source
 
 **Dependencies:**

flake.nix

@@ -0,0 +1,122 @@
+{
+  description = "Wayscriber - Screen annotation tool for Wayland";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        version = "0.9.8";
+      in {
+        packages = {
+          wayscriber = pkgs.rustPlatform.buildRustPackage {
+            pname = "wayscriber";
+            inherit version;
+            src = ./.;
+
+            cargoLock.lockFile = ./Cargo.lock;
+
+            nativeBuildInputs = with pkgs; [ pkg-config ];
+
+            buildInputs = with pkgs; [
+              cairo
+              pango
+              wayland
+              libxkbcommon
+            ];
+
+            postInstall = ''
+              install -Dm644 packaging/wayscriber.desktop $out/share/applications/wayscriber.desktop
+              install -Dm644 packaging/wayscriber.service $out/lib/systemd/user/wayscriber.service
+              for size in 24 64 128; do
+                install -Dm644 packaging/icons/wayscriber-$size.png \
+                  $out/share/icons/hicolor/''${size}x''${size}/apps/wayscriber.png
+              done
+              install -Dm644 config.example.toml $out/share/doc/wayscriber/config.example.toml
+              install -Dm644 README.md $out/share/doc/wayscriber/README.md
+              install -Dm644 LICENSE $out/share/licenses/wayscriber/LICENSE
+            '';
+
+            meta = with pkgs.lib; {
+              description = "Screen annotation tool for Wayland compositors";
+              homepage = "https://wayscriber.com";
+              license = licenses.mit;
+              platforms = platforms.linux;
+              mainProgram = "wayscriber";
+            };
+          };
+
+          wayscriber-configurator = pkgs.rustPlatform.buildRustPackage {
+            pname = "wayscriber-configurator";
+            inherit version;
+            src = ./.;
+
+            cargoLock.lockFile = ./Cargo.lock;
+            buildAndTestSubdir = "configurator";
+
+            nativeBuildInputs = with pkgs; [ pkg-config makeWrapper ];
+
+            # Iced GUI toolkit dependencies
+            buildInputs = with pkgs; [
+              cairo
+              pango
+              wayland
+              libxkbcommon
+              vulkan-loader
+              libGL
+            ];
+
+            postInstall = ''
+              install -Dm644 packaging/wayscriber-configurator.desktop \
+                $out/share/applications/wayscriber-configurator.desktop
+              for size in 24 64 128; do
+                install -Dm644 packaging/icons/wayscriber-configurator-$size.png \
+                  $out/share/icons/hicolor/''${size}x''${size}/apps/wayscriber-configurator.png
+              done
+              install -Dm644 README.md $out/share/doc/wayscriber-configurator/README.md
+              install -Dm644 LICENSE $out/share/licenses/wayscriber-configurator/LICENSE
+
+              # Wrap binary to find GL/Vulkan libraries at runtime (Iced uses dlopen)
+              wrapProgram $out/bin/wayscriber-configurator \
+                --prefix LD_LIBRARY_PATH : ${pkgs.lib.makeLibraryPath [
+                  pkgs.vulkan-loader
+                  pkgs.libGL
+                  pkgs.wayland
+                  pkgs.libxkbcommon
+                ]}
+            '';
+
+            meta = with pkgs.lib; {
+              description = "GUI configurator for wayscriber";
+              homepage = "https://wayscriber.com";
+              license = licenses.mit;
+              platforms = platforms.linux;
+              mainProgram = "wayscriber-configurator";
+            };
+          };
+
+          default = self.packages.${system}.wayscriber;
+        };
+
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            cargo
+            rustc
+            rust-analyzer
+            clippy
+            rustfmt
+            pkg-config
+            cairo
+            pango
+            wayland
+            libxkbcommon
+            vulkan-loader
+            libGL
+          ];
+        };
+      });
+}