Sapper Layer0 build error

npm run build is successful. layer0 build fails with:

Bundling Layer0 router… done.
TypeError: _b.forEach is not a function
at /Users/howie.ross/Repos/howies-www/node_modules/@layer0/core/deploy/DeploymentBuilder.js:338:126
at Array.forEach ()
at DeploymentBuilder.build (/Users/howie.ross/Repos/howies-www/node_modules/@layer0/core/deploy/DeploymentBuilder.js:336:18)
at processTicksAndRejections (internal/process/task_queues.js:95:5)
at async build (/Users/howie.ross/Repos/howies-www/node_modules/@layer0/sapper/build.js:51:5)
at async /Users/howie.ross/Repos/howies-www/node_modules/@layer0/cli/utils/build.js:40:5
at async Logger.step (/Users/howie.ross/Repos/howies-www/node_modules/@layer0/cli/utils/logger.js:47:20)
at async build (/Users/howie.ross/Repos/howies-www/node_modules/@layer0/cli/utils/build.js:38:3)
at async Object.exports.handler (/Users/howie.ross/Repos/howies-www/node_modules/@layer0/cli/commands/build.js:24:3)

Source:

It looks like you have a mix of @xdn 2.x and @layer0 3.x dependencies, also still referencing @xdn in your routes.js file.

Update these references to @layer0 and remove old @xdn dependencies and the build will succeed.