readme: document installation path as $GOPATH
@@ -25,8 +25,11 @@ instructions](https://packagecloud.io/travisci/worker/install).
### from source
-1. clone this down
1. install [Go](http://golang.org) `v1.7+`
+1. clone this down into your `$GOPATH`
+ * `mkdir -p $GOPATH/src/github.com/travis-ci`
+ * `git clone https://github.com/travis-ci/worker $GOPATH/src/github.com/travis-ci/worker`
+ * `cd $GOPATH/src/github.com/travis-ci/worker`
1. install [gvt](https://github.com/FiloSottile/gvt):
* `go get -u github.com/FiloSottile/gvt`
1. install [gometalinter](https://github.com/alecthomas/gometalinter):
