use flakes shell

flake.lock

@@ -0,0 +1,26 @@
+{
+  "nodes": {
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1662019588,
+        "narHash": "sha256-oPEjHKGGVbBXqwwL+UjsveJzghWiWV0n9ogo1X6l4cw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2da64a81275b68fdad38af669afeda43d401e94b",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs-unstable": "nixpkgs-unstable"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,22 @@
+{
+  inputs.nixpkgs-unstable.url = "nixpkgs/nixos-unstable";
+
+  outputs = { self, nixpkgs-unstable }:
+    let
+      pkgs = import nixpkgs-unstable { config.allowUnfree = true; config.android_sdk.accept_license = true; };
+      androidComposition = pkgs.androidenv.composeAndroidPackages {
+        toolsVersion = "26.1.1";
+        platformToolsVersion = "33.0.2";
+        buildToolsVersions = [ "30.0.3" ];
+        platformVersions = [ "31" "30" "29" ];
+      };
+    in {
+      devShell.x86_64-linux = pkgs.mkShell {
+        JAVA_HOME = "${pkgs.openjdk11_headless.home}";
+        ANDROID_HOME = "${androidComposition.androidsdk}/libexec/android-sdk";
+        ANDROID_SDK_ROOT = "${androidComposition.androidsdk}/libexec/android-sdk";
+
+        buildInputs = with pkgs; [ bash git androidComposition.androidsdk flutter openjdk11_headless ];
+      };
+    };
+}

shell.nix

@@ -1,15 +0,0 @@
-{ pkgs ? import <unstable> { config.android_sdk.accept_license = true; } }:
-
-let
-  androidComposition = pkgs.androidenv.composeAndroidPackages {
-    toolsVersion = "26.1.1";
-    platformToolsVersion = "33.0.2";
-    buildToolsVersions = [ "30.0.3" ];
-    platformVersions = [ "31" "30" "29" ];
-  };
-in
-pkgs.mkShell {
-  ANDROID_HOME = "${androidComposition.androidsdk}/libexec/android-sdk";
-  ANDROID_SDK_ROOT = "${androidComposition.androidsdk}/libexec/android-sdk";
-  nativeBuildInputs = with pkgs; [ flutter openjdk11_headless ];
-}