Windows builds of libsigrok depend on an external libusb branch which supports event handling by means of poll-able objects (file handles). The external branch is no longer available. Instead mainline libusb integrated the feature, but provides a different API. Build instructions and USB handling in libsigrok need adjustment. https://github.com/libusb/libusb provides usbi_os_handle_t, libsigrok's configure.ac and src/usb.c could use this when libusb_os_handle is missing.
Status update: sigrok-util 149202b4da31 unbreaks the external reference to the rawio using libusb version. Using recent mainline libusb in the sigrok build remains to be done.