So this happened to me while I tried to get a working clone of the repo for messing with it. That is not a noScribe issue, rather a deprecated dependency (sentencepiece) of a dependency (pyannote.audio).
Im not sure what an actual solution looks like, but I found a workaround that translates to installing pyannote.audio:
uv pip install pyannote.audio
or the whole list of depencies (in this example macOS arm64):
uv pip install -r environments/requirements_macOS_arm64.txt
...unfortunately you need another package manager, uv. UV seems to handle dependencies differently/better, and surprisingly resolves the underlying cmake issue of sentencepiece.