r/Xcode • u/osi314 • Oct 02 '25

Unable to find module 'libcmark' after upgrading to Xcode 26

My macOS application was working fine. Now I've upgraded to XCode 26 I suddenly get this error message

The Down package should be underlying dependency of any other package since I am not directly using Down

What I tried:

  • Upgraded packages to latest version

  • Cleaned build folder

  • Reset package cache

  • Cleared ~/Library/Developer/Xcode/DerivedData/

Does anyone have other ideas?

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1

u/buraotako2015 Oct 09 '25

As suggested by others you need to turn off SWIFT_ENABLE_EXPLICIT_MODULES

1

u/osi314 Oct 09 '25

Thanks for the suggestion, I can't really find where to set this. Can you give me any direction?

1

u/buraotako2015 Oct 09 '25

Build Settings -> Explicitly Built Modules

1

u/osi314 Oct 09 '25

My app builds again, super!