Add nixos derivation

.gitignore

@@ -105,4 +105,7 @@ venv.bak/
 # mypy
 .mypy_cache/
 
-test.py
+# nix
+result*
+
+test.py

default.nix

@@ -0,0 +1,22 @@
+with (import <nixpkgs> {});
+
+stdenv.mkDerivation {
+  name = "waydroid_script";
+
+  buildInputs = [
+    (python3.withPackages(ps: with ps; [ tqdm requests inquirerpy ]))
+  ];
+
+  src = ./.;
+
+  postPatch = ''
+    patchShebangs main.py
+  '';
+
+  installPhase = ''
+    mkdir -p $out/libexec
+    cp -r . $out/libexec/waydroid_script
+    mkdir -p $out/bin
+    ln -s $out/libexec/waydroid_script/main.py $out/bin/waydroid_script
+  '';
+}