Apparently `powershell Compress-Archive` produces zip files with backslashes in filesnames which makes them unable to be extracted with some Unix variants of extraction. For example [this failure][build] and using macOS's built-in unzip feature it creates filenames with backslashes in them rather than subdirectories. [build]: https://github.com/bytecodealliance/wasmtime-go/runs/2680596219?check_suite_focus=true