init nix flake for running arrowvortex via wine

.gitignore

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+result
+AGENTS.md

README.md

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+# ArrowVortex (Nix flake)
+
+This flake packages [ArrowVortex](https://github.com/uvcat7/ArrowVortex) from the upstream Windows release zip and runs it with Wine. The default Wine prefix is `$XDG_DATA_HOME/arrowvortex/wine` (or `~/.local/share/arrowvortex/wine` when `XDG_DATA_HOME` is unset). Override with `WINEPREFIX` if you want a different prefix.
+
+## Run from a local checkout
+
+```bash
+nix run .
+```
+
+```bash
+nix build .
+./result/bin/arrowvortex
+```
+
+## Run directly from Git
+
+This flake lives at [https://git.plebsaber.stream/arrowvortex-wine](https://git.plebsaber.stream/arrowvortex-wine). Use a `git+https` flake reference (not the `github:` shorthand):
+
+```bash
+nix run git+https://git.plebsaber.stream/arrowvortex-wine
+```
+
+Optional: install into your user profile:
+
+```bash
+nix profile install git+https://git.plebsaber.stream/arrowvortex-wine
+```
+
+Pin a branch or revision for reproducibility:
+
+```bash
+nix run 'git+https://git.plebsaber.stream/arrowvortex-wine?ref=main'
+nix run 'git+https://git.plebsaber.stream/arrowvortex-wine?rev=<commit-sha>'
+```
+
+## Requirements
+
+- Nix with flakes enabled (`experimental-features = nix-command flakes`).
+
+Wine and GUI dependencies come from nixpkgs; you need a working display (X11 or Wayland) for the editor window.

default.nix

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+{
+  lib,
+  stdenvNoCC,
+  fetchzip,
+  copyDesktopItems,
+  makeDesktopItem,
+  makeWrapper,
+  wineWow64Packages,
+}:
+
+let
+  winePkg = wineWow64Packages.stableFull;
+in
+stdenvNoCC.mkDerivation (finalAttrs: {
+  pname = "arrowvortex";
+  version = "1.0.1";
+
+  src = fetchzip {
+    url = "https://github.com/uvcat7/ArrowVortex/releases/download/v${finalAttrs.version}/ArrowVortex-${finalAttrs.version}-Windows.zip";
+    hash = "sha256-gVhP2O4GHLii1K9Jr2GKyp+FJYP8eoL1s1qmAec6x0w=";
+  };
+
+  nativeBuildInputs = [
+    makeWrapper
+    copyDesktopItems
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/share/arrowvortex
+    # fetchzip normalizes the zip root; files land directly under $src
+    cp -r $src/. $out/share/arrowvortex/
+
+    install -Dm644 "$out/share/arrowvortex/assets/arrow vortex icon.png" \
+      $out/share/icons/hicolor/128x128/apps/arrowvortex.png
+
+    makeWrapper ${lib.getExe winePkg} $out/bin/arrowvortex \
+      --set WINEDEBUG "-all" \
+      --set WINEARCH "win64" \
+      --run 'export WINEPREFIX="''${WINEPREFIX:-''${XDG_DATA_HOME:-''$HOME/.local/share}/arrowvortex/wine}"' \
+      --run 'mkdir -p "''$WINEPREFIX"' \
+      --chdir "$out/share/arrowvortex" \
+      --add-flags "ArrowVortex.exe"
+
+    runHook postInstall
+  '';
+
+  desktopItems = [
+    (makeDesktopItem {
+      name = "arrowvortex";
+      desktopName = "ArrowVortex";
+      comment = "Simfile editor for StepMania, ITG, osu!, and similar rhythm games";
+      exec = "arrowvortex";
+      icon = "arrowvortex";
+      categories = [
+        "AudioVideo"
+        "Utility"
+      ];
+      startupWMClass = "arrowvortex.exe";
+    })
+  ];
+
+  meta = {
+    description = "Simfile editor for StepMania, ITG, osu!, and similar rhythm games";
+    homepage = "https://github.com/uvcat7/ArrowVortex";
+    changelog = "https://github.com/uvcat7/ArrowVortex/releases";
+    downloadPage = "https://github.com/uvcat7/ArrowVortex/releases";
+    sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
+    license = lib.licenses.gpl3Plus;
+    mainProgram = "arrowvortex";
+    maintainers = [ ];
+    platforms = winePkg.meta.platforms;
+  };
+})

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1777954456,
+        "narHash": "sha256-hGdgeU2Nk87RAuZyYjyDjFL6LK7dAZN5RE9+hrDTkDU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "549bd84d6279f9852cae6225e372cc67fb91a4c1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "ArrowVortex (Windows release) wrapped with Wine";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    { nixpkgs, ... }:
+    let
+      lib = nixpkgs.lib;
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+      forAllSystems = f: lib.genAttrs systems (system: f system);
+    in
+    {
+      packages = forAllSystems (
+        system:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+            config = { };
+          };
+        in
+        {
+          default = pkgs.callPackage ./default.nix { };
+          arrowvortex = pkgs.callPackage ./default.nix { };
+        }
+      );
+
+      apps = forAllSystems (
+        system:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+            config = { };
+          };
+          arrowvortex = pkgs.callPackage ./default.nix { };
+        in
+        {
+          default = {
+            type = "app";
+            program = "${lib.getExe arrowvortex}";
+            meta = {
+              inherit (arrowvortex.meta) description homepage license;
+            };
+          };
+        }
+      );
+    };
+}