On 12/03/2023 4:01 PM, ryuukk_ wrote: > So this is a dub issue? Nope, dub is doing everything ok, this is for ImportC. > It is able to find the linker, why can't it find the preprocessor? Its probably not installed. We don't ship a C toolchain, it uses the system one (MSVC, which you would normally get via Visual Studio).