When attempting to add or resolve some ObjC packages (for example, TZImagePickerController) using Xcode’s frontend to SPM, a compile error occurs like this:
target ‘PACKAGENAME’ has invalid header layout: umbrella header found at '/Users/USERNAME/Library/Developer/Xcode/DerivedData/PROJECT-fpcffpkaycriklgbcfxqlgkqjolr/SourcePackages/checkouts/PACKAGENAME/PACKAGENAME/PACKAGENAME.h', but directories exist next to it: /Users/USERNAME/Library/Developer/Xcode/DerivedData/PROJECT-fpcffpkaycriklgbcfxqlgkqjolr/SourcePackages/checkouts/PACKAGENAME/PACKAGENAME/PACKAGENAME.bundle; consider removing them
Does anyone know a workaround?
One workaround I found is just installing Xcode 12.4 and using that instead of 12.5.
No idea why this is happening, but I did submit a feedback about it: FB9097550.