Indeed currently the build timeout can cause problems when building large apps. You would be glad to know that we would increase the build timeout for the upcoming release at the end of the month, so you do not encounter such problems. Further more, we would improve the performance of the build process, so that such issues do not arise again.
For the time being, please check whether you do not have any Cordova Core plugins enabled, but you do not need. In such case, disable those plugins. Also check for any files that are not supposed to be in the project (i.e. copied by mistake).
Sorry for the temporary inconvenience.
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