title: stuck at dart sdk downloading while setup the flutter
body: <h2>Steps to Reproduce</h2>
  
  <p>Whenever I tried to run any flutter or dart on cmd after installing the git bash it's start download the dart SDK again even I already set up it. I used flutter for nearly 7 8 months but I never face a problem like this recently I reset my pc and setup flutter again but this time it's not setup</p>
  <p><strong>Steps I will do for installing the flutter</strong></p>
  <ol>
  <li>download the Dart SDK and setup path in a user variable and run dart --version so it works fine its show the current dart version</li>
  <li>After I setup flutter SDK similar to dart but after run dart --version and it again works fine and shows the current version or if I run any flutter command like flutter doctor its shows an error like this<br />
  Error: Unable to find git in your PATH.</li>
  <li>To resolve this error I install git
  **Now the problem has come **</li>
  <li>Again when I run the dart --version its work fine but if I tried to run flutter doctor or any flutter command its start downloading the Dart SDK</li>
  </ol>
  <p>Output:</p>
  <pre><code>Microsoft Windows [Version 10.0.18363.1379]
  (c) 2019 Microsoft Corporation. All rights reserved.
  
  C:\Users\prash&gt;dart --version
  Dart SDK version: 2.10.5 (stable) (Tue Jan 19 13:05:37 2021 +0100) on &quot;windows_x64&quot;
  
  C:\Users\prash&gt;flutter doctor
  Checking Dart SDK version...
  Downloading Dart SDK from Flutter engine 2f0af3715217a0c2ada72c717d4ed9178d68f6ed...
  Terminate batch job (Y/N)? y
  
  C:\Users\prash&gt;dart --version
  Dart SDK version: 2.10.5 (stable) (Tue Jan 19 13:05:37 2021 +0100) on &quot;windows_x64&quot;
  </code></pre>
  <p>Please help so to fix this I doesn't want to download the dart SDK if I already setup its</p>