转到：SQL Lite包未从工作区加载

New Go programmer here -- apologies in advance for any misused terminology or convention breaking -- I'm still getting up to speed on the language. I'm trying to use this sql lite package in my go programs, and sometimes my program will fail with the following error

# command-line-arguments
/usr/local/go/pkg/tool/darwin_amd64/link: cannot open file        
/usr/local/go/pkg/darwin_amd64/github.com/mattn/go-sqlite3.a: open   
/usr/local/go/pkg/darwin_amd64/github.com/mattn/go-sqlite3.a: no such 
file or directory

This happens when I try to run my program with go run main.go. The go-sqlite3.a file exists in my workspace package, but go doesn't want to load it for for some reason. This only seems to happen when I try importing the module from a — sub-package (? not sure if this is the right term).

If I do the following in a single main.go file

package main

import(
    "fmt"
  _ "github.com/mattn/go-sqlite3"    
)

func main(){
    fmt.Println("Hello World from main()")
}

everything works fine. However, if I add a package to my program so the file structure is laid out like this

main.go
test/test.go

and I include my package (in main.go) like this

import(
    "fmt"
    "./test"    
)

func main(){
    test.Test()
}

and my package (test/test.go) looks like this

package test

import(
    "fmt"
    _ "github.com/mattn/go-sqlite3"    
)

func Test(){
    fmt.Println("Hello World from Test() in test/test.go")
}

then go run main.go fails with the above error message.

Does anyone know what's going on here? Is it wrong to use a ./ in my import? I've tried reading up on this online, but I've had trouble finding something that addresses the behavior I'm seeing and the reasons for it.