Huge number of warnings when using Firebase package as .external dependency

What happened?

This bug has been around for some time now. Using Firebase as an external package with tuist creates a huge number of warnings in Xcode.

e.g. using:

.package(url: "https://github.com/firebase/firebase-ios-sdk", from: "10.28.0")

with: .external(name: "FirebaseAnalytics") .external(name: "FirebaseCrashlytics")

How do we reproduce it?

Min reproducible example project: https://github.com/kekearif/DemoFirebase

1.) tuist install 2.) tuist cache 3.) tuist generate

Run app and look at warnings.

Finally can remove the .package from Package.swift and remove .external(name: "FirebaseAnalytics") and .external(name: "FirebaseCrashlytics") from Project+Extension.

1.) tuist clean 2.) tuist generate

Observe that the warnings are now gone.

Error log

/var/folders/m2/w681m9f2fx_wg7_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/Intermediates.noindex/ExplicitPrecompiledModules/ _Builtin_stdint-8TL7P5BGGBMISA611P2JD3K3.pcm: No such file or directory • /var/folders/m2/w681m9fj2fx_wg7|_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/ _Builtin_stddef-5MGDKJGINVOGJAEOUESH6PP5.pcm: No such file or directory /var/folders/m2/w681m9f2fx_wg7_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/_Builtin_stdbool- EB1R3YSHNDYKH7FX4BYVQT696.pcm: No such file or directory /var/folders/m2/w681m9f2fx_wg7_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/ _string-9Y561G5FSV5EU19E72MR420ZE.pcm: No such file or directory • /var/folders/m2/w681m9fj2fx_wg7|_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/ _stdlib-92MSG77IGT2CR6LJNKEHKR075.pcm: No such file or directory • /var/folders/m2/w681m9f2fx_wg_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/DarwinFoundation- BO8UJ84YTDSB2LTREPW1YRXEF.pcm: No such file or directory • /var/folders/m2/w681m9fj2fx_wg7|_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/_stdint-AEIAEOZ78FS7DSCLQ8HQ02UZ.pcm: No such file or directory var/folders/m2/w681m9f2fx_wg7|_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/ Foundation-1BR4ZS5AJOD30XNTFDFTKB2Bl.pcm: No such file or directory /var/folders/m2/w681m9f2fx_wg_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/ asl-72147R7L04UNRXT4TR6DH5P2.pcm: No such file or directory • /var/folders/m2/w681m9fj2fx_wg7|_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/GoogleUtilities_Environment- BXEE95N2D5FJJ307CG652TXT4.pcm: No such file or directory /var/folders/m2/w681m9f2fx_wg_m38_bz00000gn/T/TemporaryDirectory.Xn8WIT/derived-data/ Build/intermediates.noindex/ExplicitPrecompiledModules/ ObjectiveC-800LA1HYWS5UMGOZARST8IMY4.pcm: No such file or directory

macOS version

15.0

Tuist version

4.27.0

Xcode version

16.0