With an updated Wine Mono containing the new Recycle Bin support, and the P: drive manually created in winecfg, packing succeeded for me and created a Scripts.pbo file.
Implemented Recycle Bin support in Wine Mono: https://gitlab.winehq.org/mono/wine-mono/-/commit/70906828151fb4081761fee5f4c85110af5a6f5c I'll try the instructions and see if I can retest this.
Yeah that'd be this project specifically: https://gitlab.winehq.org/mono/mono-basic Looks like what's unimplemented is sending to Recycle Bin specifically: https://gitlab.winehq.org/mono/mono-basic/-/blob/main/vbruntime/...