Error in 'yarn kbn bootstrap'

I'm trying to follow the instructions in setting up the Kibana development environment, but yarn kbn bootstrap is failing on installing dependencies in [@kbn/es]. Installing on Ubuntu 16.04. Here is the yarn-error.log

Installing dependencies in [@kbn/es]:

[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
error An unexpected error occurred: "Reduce of empty array with no initial value".
info If you think this is a bug, please open a bug report with the information provided in "/home/cfischer/kibana/packages/kbn-es/yarn-error.log".
info Visit for documentation about this command.

[bootstrap] failed:

Error: Command failed: yarn install --non-interactive --mutex file
    at makeError (/home/cfischer/kibana/packages/kbn-pm/dist/index.js:44877:9)
    at Promise.all.then.arr (/home/cfischer/kibana/packages/kbn-pm/dist/index.js:44982:16)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:188:7)
error Command failed with exit code 1.
info Visit for documentation about this command.

That unfortunately is an issue in yarn 1.7.0. Since the fix seems not to have been released yet. I fear the only solution around that is actually downgrading to an older yarn version.


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