Botframework-composer: Yarn Installation Issue - Integrity Check Failed

[ToughList51]

Performing a clean install, I'm following the Composer set-up instruction from here:

https://docs.microsoft.com/en-us/composer/setup-yarn

but get the following output from Yarn:

yarn install v1.22.0
[1/5] 🔍  Validating package.json...
[2/5] 🔍  Resolving packages...
[3/5] 🚚  Fetching packages...
warning Pattern ["@bfcomposer/bf-lu@https://botbuilder.myget.org/F/botbuilder-declarative/npm/@bfcomposer/bf-lu/-/@bfcomposer/bf-lu-1.1.8.tgz"] is trying to unpack in the same destination "/Users/benburt/Library/Caches/Yarn/v6/npm-@bfcomposer-bf-lu-1.1.8-a3c7767de038025157bdc8cf9f56b393f1428fd4-integrity/node_modules/@bfcomposer/bf-lu" as pattern ["@bfcomposer/bf-lu@^1.1.8","@bfcomposer/bf-lu@^1.1.8"]. This could result in non-deterministic behavior, skipping.
error https://botbuilder.myget.org/F/botbuilder-declarative/npm/@microsoft/bf-cli-command/-/@microsoft/bf-cli-command-1.0.0.tgz: Integrity check failed for "@microsoft/bf-cli-command" (computed integrity doesn't match our records, got "sha512-FuXsPQhZXPurHp3GSIg0zjYhtXyUSJ0lCgqpWxIEESNdf9vEKjLu2lRQwW3rERTFfp56qvvSvVcqLkhSCWU7xA== sha1-AeLCNNgmnv3ACTWvXBjHT6zcAiY=")
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

OS

• [x] macOS
• [ ] Windows
• [ ] Ubuntu

Additional context

Have tried this on a Windows 10 machine with the same results. Following the docker instructions produces the same results

[vkacherov]

@ToughList51 Try refreshing the checksums in yarn.lock by passing --update-checksums

yarn install --update-checksums

[fwickert]

@vkacherov Thanks. I had the same issue and with your arg it works.

[ToughList51]

@vkacherov all fixed - thanks!

[zxyanliu]

@hibrenda Is there anything I should update in the doc?