Xcode 11.5 Unable to open dependencies file

Number:rdar://FB7716325 Date Originated:May 27, 2020 at 11:27 AM
Status:Open Resolved:No
Product:Xcode Product Version:11.4 & 11.5
Classification: Reproducible:Yes
I recently updated Xcode from version 11.3 to 11.5 and one of my packages (that I use in one of my app, I developed both the app and the package) can't compile because of a permission error:
error: unable to open dependencies file (/Users/arguiot/Library/Developer/Xcode/DerivedData/Euclid_Calculator-esmjlsretjpuvpajvqzmllnvcpse/Build/Intermediates.noindex/Euler.build/Debug/Euler.build/Objects-normal/x86_64/Fibonacci-PACKAGE:https://github.com/arguiot/Euler::MAINGROUP::REF_0::REF_32.d) (in target 'Euler' from project 'Euler')
Command CompileSwiftSources emitted errors but did not return a nonzero exit code to indicate failure

It seems to be an Xcode problem (or `xcodebuild` toolchain) because the `swift build` command seems to work on the package. Unfortunately, there is no way of using the same command for my app, I have to use Xcode.

One obvious solution is to use Xcode 11.3 but WWDC and iOS 14 are coming and I don't want to be in a situation where I can't use the new features.

I already tried "common" stuff like cleaning the build folder, switching the build system to the legacy build system, ...

I also tried to give read & write access to everyone on the DerivedData folder (and subfolders).


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