Segfault during rn-gobuild-android

Hello,

I am trying to see if we could build this app on F-Droid (https://github.com/keybase/client/issues/6899).
If I understand correctly, we need to run yarn rn-gobuild-android to build keybaselib.aar before we can build the app with Gradle.

I tried to do that for v2.13.1 but the build process crashes:

yarn run v1.13.0
$ ./react-native/gobuild.sh android
Using temp GOPATH: /tmp/go-android
Clearing /tmp/go-android/src
Getting client (using local GOPATH)... To use git master, set LOCAL_CLIENT=0
Re-vendoring...
Building for Android (/home/pierre/www/client/shared/react-native/android/keybaselib/keybaselib.aar)...
Running gomobile init cause: ./react-native/gobuild.sh: line 125: gomobile: command not found
Build gomobile...
Doing gomobile init
gomobile: /tmp/go-android/bin/gobind -lang=go,java -outdir=/tmp/gomobile-work-610745201 -tags=android github.com/keybase/client/go/bind failed: exit status 2
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x4066ec]

goroutine 1 [running]:
panic(0x6e4220, 0xc4200120c0)
	/usr/lib/go-1.7/src/runtime/panic.go:500 +0x1a1
main.run()
	/tmp/go-android/src/golang.org/x/mobile/cmd/gobind/main.go:145 +0x9ac
main.main()
	/tmp/go-android/src/golang.org/x/mobile/cmd/gobind/main.go:45 +0x27

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Do you know what could cause this?

Start with react-native/gobuild.sh and the yarn rn-gobuild-android entry point, then inspect the failure at /tmp/go-android/src/golang.org/x/mobile/cmd/gobind/main.go:145. Reproduce the keybaselib.aar build using the reported setup and determine why gobind fails before the nil-pointer panic. Done means the command completes without the segfault or reports a clear actionable build error.