I'm trying to compile my project under gdc, and at some point -Wall and -Werror are introduced as compiler flags.

I depend on the requests package, which in turn depends on the automem package, which throws a deprecation warning during compilation and -Werror kicks in, erroring out.

name "hello"
targetType "executable"
dependency "requests" version="~>2.1.3"

$ dub build --compiler=gdc
     Warning Configuration [application] of package hello contains no source files. Please add {"targetType": "none"} to its package description to avoid building it.
    Starting Performing "debug" build using gdc for x86_64.
    Building automem 0.6.10: building configuration [library]
/home/zorael/.dub/packages/automem/0.6.10/automem/source/automem/vector.d-mixin-211:211:7: error: cannot throw object of qualified type ‘immutable(BoundsException)’ [-Werror=deprecated]
/home/zorael/.dub/packages/automem/0.6.10/automem/source/automem/vector.d-mixin-211:211:7: error: cannot throw object of qualified type ‘immutable(BoundsException)’ [-Werror=deprecated]
d21: all warnings being treated as errors
Error gdc failed with exit code 1.

How do I work around this?

Declaring dflags "-Wno-deprecated" platform="gdc" in dub.sdl does not work.

Setting the DFLAGS environment variable with DFLAGS="-Wno-deprecated" dub build --compiler=gdc technically does compile, but the build becomes a $DFLAGS-type build and my configurations break.

What else can I do?