The answer is in the environment :)  Go uses a few variables:

- GOROOT, which points to the Go system installation.
- GOPATH, which points to the Go user "workspace", ~/go by default.

A GOPATH tree looks like this:

--8<---------------cut here---------------start------------->8---
> tree ~/go
~/go
├── bin
│   ├── foo
│   └── ipfs
└── src
    ├── github.com
    │   ├── aarzilli
    │   │   └── golua
    │   │       ├── example
    │   │       │   ├── alloc.go
    │   │       │   ├── basic.go
    │   │       │   ├── calls.lua
    │   │       │   ├── error.go
    │   │       │   ├── panic.go
    │   │       │   ├── quickstart.go
    │   │       │   └── userdata.go
    │   │       ├── LICENSE
    │   │       ├── lua
    │   │       │   ├── c-golua.c
    │   │       │   ├── golua.go
    │   │       │   ├── golua.h
    │   │       │   ├── lauxlib.go
    │   │       │   ├── lua
    │   │       │   │   ├── lauxlib.h
    │   │       │   │   ├── luaconf.h
    │   │       │   │   ├── lua.h
    │   │       │   │   └── lualib.h
    │   │       │   ├── lua_defs.go
    │   │       │   ├── lua.go
    │   │       │   └── lua_test.go
    │   │       ├── README.md
    │   │       └── TODO
--8<---------------cut here---------------end--------------->8---

It's populated automatically by =go get=, =go install=, etc.

The only thing it does not guess automatically is the path to ~/go/bin, which
you must add like all other executable paths to PATH.
For instance, from you ~/.profile or similar:

  export PATH=$PATH:~/go/bin

Hope that helps!

-- 
Pierre Neidhardt
https://ambrevar.xyz/