Cannot build ios app in debug after upgrading to xcode 12.5

Question

i recently upgraded xcode to 12.5 in order to test on the new ios 14.5.x unfortunately i am not able to compile my project anymore due to the following error:

Undefined symbols for architecture arm64:
  "Swift._ArrayBuffer._copyContents(initializing: Swift.UnsafeMutableBufferPointer<A>) -> (Swift.IndexingIterator<Swift._ArrayBuffer<A>>, Swift.Int)", referenced from:
      generic specialization <serialized, Swift._ArrayBuffer<Swift.Int8>> of Swift._copyCollectionToContiguousArray<A where A: Swift.Collection>(A) -> Swift.ContiguousArray<A.Element> in AppDelegate.o

It seems to be linked to the ZIPFoundation.framework that i am using within my project: if i comment out the usage of the library i can compile just fine.

I was using (happily) release 0.9.9 but even tried to upgrade to 0.9.12 (latest release) or even the latest git code from https://github.com/weichsel/ZIPFoundation with no effect

Note that i can compile in release, it is just the debug build that is failing on xcode12.5

i found other people lamenting similar issue (specially react native apps) with the new xcode here, here and here