title: Permission denied during "cargo build"
body: <p>I tried</p>
  <pre class="lang-sh prettyprint-override"><code>cargo build --target wasm32-unknown-unknown --release
  </code></pre>
  <p>to build the <a href="https://github.com/smiley717/rust-counter-tutorial" rel="nofollow noreferrer"><code>rust-counter-tutorial</code></a>, and I get the error</p>
  <pre class="lang-sh prettyprint-override"><code>error: failed to open: /home/[...]/target/release/.cargo.lock
  
  Caused by:
    Permission denied (os error 13)
  </code></pre>
  <p>I'm very new to coding so bear with me.
  I am on WSL Ubuntu 18.04</p>