x/mobile: error when running 'gomobile init'

[fanmanpro]

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

go version go1.7.1 linux/amd64

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

go env:

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/host/projects/golang-prototyping"
GORACE=""
GOROOT="/usr/lib/go"
GOTOOLDIR="/usr/lib/go/pkg/tool/linux_amd64"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0"
CXX="g++"
CGO_ENABLED="1"

echo $PATH:
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/host/projects/golang-prototyping/bin

What did you do?

cd /host/projects/golang-prototyping
export GOPATH=$PWD
export PATH=$PATH:$GOPATH/bin
go get golang.org/x/mobile/cmd/gomobile
gomobile init

~10 minutes later I got the error message

What did you expect to see?

No error message and then being able to run:
gomobile build -target=android hello.go

What did you see instead?

I received this error message.
gomobile: open /host/projects/golang-prototyping/pkg/gomobile/work-685604373/android-ndk-r12b/platforms/android-21/arch-arm64/usr/include/linux/netfilter/xt_connmark.h: file exists

Additional notes

I'm running this go version inside a Arch Linux Docker container. I installed go, go-tools, etc. (all dependencies) using pacman package manager. My host is Windows 10 64bit and my terminal is "Docker Quickstart Terminal" using VMware and not Hyper-V. Not sure if this is all relevant.

Thankful for you time 👍

[eliasnaur]

Gomobile doesn't download the NDK anymore.