diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..f4c931f
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,71 @@
+{ pkgs }:
+
+let
+  inherit (pkgs) lib;
+
+  pyproject-nix-src = builtins.fetchGit {
+    url = "https://github.com/pyproject-nix/pyproject.nix.git";
+    rev = "1b1485546d85f6f6c7aadb10c4923dbc09633263";
+  };
+
+  uv2nix-src = builtins.fetchGit {
+    url = "https://github.com/pyproject-nix/uv2nix.git";
+    rev = "7f9c6b613d2e749e54854b1d60ab6a2192db889e";
+  };
+
+  build-system-pkgs-src = builtins.fetchGit {
+    url = "https://github.com/pyproject-nix/build-system-pkgs.git";
+    rev = "150839ac67b5a34db56a55e8f6b7099a4e7878ab";
+  };
+
+  pyproject-nix = import pyproject-nix-src {
+    inherit lib;
+  };
+
+  uv2nix = import uv2nix-src {
+    inherit lib pyproject-nix;
+  };
+
+  pyproject-build-systems = import build-system-pkgs-src {
+    inherit lib pyproject-nix uv2nix;
+  };
+
+
+  src = builtins.fetchGit {
+    url = "https://cvs.moegen-wir.net/mikegerber/git-annex-duplicates.git";
+    rev = "fccb0a672dac36d38b5d464848c3447267e39b0c";
+  };
+
+
+  workspace = uv2nix.lib.workspace.loadWorkspace {
+    workspaceRoot = src;
+  };
+
+  overlay = workspace.mkPyprojectOverlay {
+    sourcePreference = "wheel";
+  };
+
+  python = pkgs.python3;
+
+  pythonSet =
+    (pkgs.callPackage pyproject-nix.build.packages {
+      inherit python;
+    }).overrideScope (
+      lib.composeManyExtensions [
+        pyproject-build-systems.overlays.default
+        overlay
+      ]
+    );
+
+  venv = pythonSet.mkVirtualEnv
+    "git-annex-duplicates-env"
+    workspace.deps.default;
+
+  inherit (pkgs.callPackages pyproject-nix.build.util { })
+    mkApplication;
+
+in
+mkApplication {
+  inherit venv;
+  package = pythonSet.git-annex-duplicates;
+}