by raul.san@sent.com:

build.Import is loading data about GOROOT instead of use GOPATH like I've set.

// * * *
package main

import (
    "fmt"
    "go/build"
    "log"
)

func main() {
    fmt.Println("GOROOT:", build.Default.GOROOT)
    fmt.Println("GOPATH:", build.Default.GOPATH)
    println()

    pkg, err := build.Import("", build.Default.GOPATH, build.FindOnly)
    if err != nil {
        log.Fatalf("GOROOT is not set: %s", err)
    }
    fmt.Println(pkg)
}
// * * *

GOROOT: /opt/go
GOPATH: /opt/go-3pkg:/home/under/go

&{/opt/go/src/pkg    /opt/go /opt/go/src/pkg /opt/go/pkg /opt/go/bin true
/opt/go/pkg/linux_amd64/.a [] [] [] [] [] [] [] [] [] [] map[] [] [] map[] [] [] map[]}