title: /bin/sh: 1: go: not found , but `go` is clearly in the PATH variable
body: <p>Been pulling out my hairs on this one, it must be so simple but for some reason I can't get it to work..</p>
  <p>I'm using go1.15, on Ubuntu 18.04, trying to build lnd from source off of github.</p>
  <p>I run <code>sudo make install</code> after all the preliminaries but keep getting error</p>
  <pre><code>GO111MODULE=on go install -v -tags=&quot;&quot; -ldflags &quot; -s -w -X github.com/lightningnetwork/lnd/build.Commit=v0.11.0-beta-199-g98da919bf1c421dd4a976506761e626e39384a8d -X github.com/lightningnetwork/lnd/build.CommitHash=98da919bf1c421dd4a976506761e626e39384a8d -X github.com/lightningnetwork/lnd/build.GoVersion= -X github.com/lightningnetwork/lnd/build.RawTags=&quot; github.com/lightningnetwork/lnd/cmd/lnd
  /bin/sh: 1: go: not found
  Makefile:139: recipe for target 'install' failed
  make: *** [install] Error 127
  </code></pre>
  <p>i have <code>GOPATH=/usr/local/go</code> and have added <code>/usr/local/go/bin</code> to my PATH variable</p>
  <p>can't understand what i am doing wrong
  <code>go version</code> returns normally</p>
  <p>I'm an intermediate programmer, but been using Linux for many years and do not understand what is going on.</p>