control: close -1
> python3-zstandard : Depends: libzstd1 (< 1.5.6~) but 1.5.6+dfsg-1 is to be installed
this looks like a python-zstandard issue, but I just installed successfully mitmproxy on sid, ii libzstd1:amd64 1.5.6+dfsg-1 amd64 fast lossless compression algorithm ii python3-zstandard 0.23.0-2 amd64 Python bindings for interfacing with Zstandard library ii mitmproxy 8.1.1-2 all SSL-capable man-in-the-middle HTTP proxy Closing then G.
