'parts/go' property does not match the required schema: 'plugin' is a required property

[Alvaro Uria]

While trying to build [1] using the Snapstore build farm, I got the error pasted below for all archs. However, in [2], it is explicitly mentioned that in order to use a newer Go version, the extra part to be configured should be (ie. from the doc):
"""
go:
  source-tag: go1.7.5
"""

Since snapcraft.yaml is using base core18, I'm not sure if something may have changed? Could you please guide me and possibly update the docs? Thank you.

1. https://github.com/auria/snap-grafana/blob/master/snapcraft.yaml
2. https://docs.snapcraft.io/go-applications

Running pull phase...
Using 'snapcraft.yaml': Project assets will be searched for from the 'snap' directory.
Issues while validating snapcraft.yaml: The 'parts/go' property does not match the required schema: 'plugin' is a required property
Build failed
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/lpbuildd/target/build_snap.py", line 253, in run
    self.pull()
  File "/usr/lib/python2.7/dist-packages/lpbuildd/target/build_snap.py", line 219, in pull
    env=env)
  File "/usr/lib/python2.7/dist-packages/lpbuildd/target/build_snap.py", line 97, in run_build_command
    return self.backend.run(args, env=full_env, **kwargs)
  File "/usr/lib/python2.7/dist-packages/lpbuildd/target/lxd.py", line 497, in run
    subprocess.check_call(cmd, **kwargs)
  File "/usr/lib/python2.7/subprocess.py", line 541, in check_call
    raise CalledProcessError(retcode, cmd)
CalledProcessError: Command '['lxc', 'exec', 'lp-bionic-s390x', '--env', 'LANG=C.UTF-8', '--env', 'SHELL=/bin/sh', '--env', 'SNAPCRAFT_LOCAL_SOURCES=1', '--env', 'SNAPCRAFT_SETUP_CORE=1', '--env', 'SNAPCRAFT_BUILD_INFO=1', '--env', 'SNAPCRAFT_IMAGE_INFO={"build_url": "https://launchpad.net/~build.snapcraft.io/+snap/ae01291f418f790aeb84a167f91878ca/+build/550176"}', '--env', 'SNAPCRAFT_BUILD_ENVIRONMENT=host', '--env', 'http_proxy=http://10.10.10.1:8222/', '--env', 'https_proxy=http://10.10.10.1:8222/', '--env', 'GIT_PROXY_COMMAND=/usr/local/bin/snap-git-proxy', '--', '/bin/sh', '-c', 'cd /build/grafana && linux64 snapcraft pull']' returned non-zero exit status 2

[Ian Johnson (anonymouse67)]

Yes now since you define a base in the snap you can't use remote parts which is what the `go` part is.

Instead for the go plugin specifically you should just use go-channel to select the version of go you need, otherwise without the `after: [go]` the go plugin will by default install the latest channel of the go snap to do the build.

[Sergio Schvezov (sergiusens)]

This is no longer part of the documentation