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

$ go version
go version go1.11.5 darwin/amd64

$ vgo version
go version go1.11.5 darwin/amd64 vgo:devel +b0a1c5df98

Does this issue reproduce with the latest release?

Yes (I just installed vgo today)

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

$ go env
GOARCH="amd64"

GOBIN=""

GOCACHE="/Users/mike/Library/Caches/go-build"

GOEXE=""

GOFLAGS=""

GOHOSTARCH="amd64"

GOHOSTOS="darwin"

GOOS="darwin"

GOPATH="/Users/mike/go"

GOPROXY=""

GORACE=""

GOROOT="/usr/local/go"

GOTMPDIR=""

GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"

GCCGO="gccgo"

CC="clang"

CXX="clang++"

CGO_ENABLED="1"

GOMOD=""

CGO_CFLAGS="-g -O2"

CGO_CPPFLAGS=""

CGO_CXXFLAGS="-g -O2"

CGO_FFLAGS="-g -O2"

CGO_LDFLAGS="-g -O2"

PKG_CONFIG="pkg-config"

GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/8f/52n7yvw92z9_qccbwpd5blnw0000gn/T/go-build582893504=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

I have a file myfile.go with contents:

package mypackage

import (
	"github.com/docker/docker/errdefs"
)

I can use go get successfully to fetch the errdefs package needed above:

$ go get -v github.com/docker/docker/errdefs
# success

But using vgo build fails:

$ vgo build
go: creating new go.mod: module github.com/PullRequestInc/testvgo
go: finding github.com/docker/docker/errdefs latest
myfile.go:4:2: unknown import path "github.com/docker/docker/errdefs": cannot find module providing package github.com/docker/docker/errdefs

My guess it has something to do with either:

• The weird way this package in github redirects to moby. (It's unclear to me how go get looks up these dependencies)
• Possibly the fact that there's not an errdefs.go file in https://github.com/moby/moby/tree/master/errdefs

Note that I don't encounter this problem when importing other related packages:

import (
	//"github.com/docker/docker/errdefs"
	"github.com/docker/docker/api/types"
        "github.com/docker/docker/api/types/container"
        "github.com/docker/docker/client"	
)

What did you expect to see?

I expected vgo build to succeed.

What did you see instead?

vgo build failed with error:

myfile.go:4:2: unknown import path "github.com/docker/docker/errdefs": cannot find module providing package github.com/docker/docker/errdefs