Control: reassign ! gdc-6 6.2.0-1
I resolved this in the appstream-generator package by adding -ldl to the linker command-line manually. But I really think this should be addressed in GDC itself, likely Phobos is not linked correctly and is missing the linker flag, or GDC should automatically add it if it's required. (Failing to link the languages standard-library is something I'd consider a compiler issue) Cheers, Matthias