Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go version devel +fcc3514 Fri Jul 7 05:51:55 2017 +0000 darwin/amd64

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN="/Users/emmanuelodeke/go/bin"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/emmanuelodeke/go"
GORACE=""
GOROOT="/Users/emmanuelodeke/go/src/go.googlesource.com/go"
GOTOOLDIR="/Users/emmanuelodeke/go/src/go.googlesource.com/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/v3/7z434qpx5v3bw0wh8h2myfpw0000gn/T/go-build296284552=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"

What did you do?

Went into a private repo of mine and ran go get

go get -u

package main

import (
	"fmt"

	"github.com/orijtech/otils"
)

func main() {
	fmt.Printf("firstNonEmpty: %q\n", otils.FirstNonEmptyString("", "a", ""))
}

Running go get or go build for the example above works alright though and run prints out

firstNonEmpty: "a"

If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.

What did you expect to see?

Successful compilation

What did you see instead?

$ go build
# github.com/odeke-em/fb
./fblive.go:52:11: undefined: otils.FirstNonEmptyString

A bizarre error claiming otils.FirstNonEmptyString is undefined, yet running the working sample with the same import on the same computer works alright and here is
http://godoc.org/github.com/orijtech/otils#FirstNonEmptyString

Unfortunately I can't guess what's up with the import as this is the first time am seeing this error.