Swift Package Manager xcframework is not building with Swift 6 toolchain

[shivatinker]

Which Version of Lottie are you using?

Lottie 4.4.3, imported into project via https://github.com/airbnb/lottie-spm

Expected Behavior

Our project should build with Swift 6 toolchain

Actual Behavior

We are getting this error:

Failed to build module 'Lottie'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 5.9.2 (swiftlang-5.9.2.2.56 clang-1500.1.0.2.5)', while this compiler is 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.3.300 clang-1600.0.20.10)'). Please select a toolchain which matches the SDK.

Also there is a bunch of errors like those:

We would like to get some estimates on this issue, because it effectively blocks our builds on Xcode 16 beta. Probably we will try to build Lottie from source or create a fork, but anyways I am just letting you know about this problem 👌

[calda]

Does it work if you use lottie-ios instead of lottie-spm?

[shivatinker]

Thanks for the quick response!

Yes, it works with lottie-ios. Interestingly, after I added lottie-ios, builded, and replaced it with lottie-spm again, it somehow compiled. I cleaned caches and DerivedData multiple times before and had the same error, but now it seems to work with lottie-spm. I guess this is some kind of package manager bug.

I think this is resolved for now, if anyone will get same issue, re-adding package into project seems to help! Thanks again.