title: 'go install' will not find package "fmt"
body: <p>I installed go 1.7.4 by untarring it into ~/go and setting GOROOT accordingly. I also created ~/work/src/github.com/user/hello and set GOPATH accordingly.</p>
  
  <p>When trying the hello world example from <a href="https://golang.org/doc/install#testing" rel="nofollow noreferrer">https://golang.org/doc/install#testing</a> I get the following error:</p>
  
  <pre><code>$ go install github.com/user/hello
      ../work/src/github.com/user/hello/hello.go:3:8: cannot find package "fmt" in any of:
      /home/user/go/src/pkg/fmt (from $GOROOT)
      /home/user/work/src/fmt (from $GOPATH)
  package github.com/user/hello
      imports runtime: cannot find package "runtime" in any of:
      /home/user/go/src/pkg/runtime (from $GOROOT)
      /home/user/work/src/runtime (from $GOPATH)
  </code></pre>
  
  <p>Checking ~/go, I find fmt in ~/go/src/fmt and not ~/go/src/pkg/fmt</p>
  
  <p>It feels like I am missing something crucial. Thankful for assistance.</p>