```
lotus:~% trezorctl --help
#(1 pts/17) 31 12:28:52.115
Traceback (most recent call last):
  File "/usr/bin/trezorctl", line 5, in <module>
    from trezorlib.cli.trezorctl import cli
  File "/usr/lib/python3/dist-packages/trezorlib/cli/__init__.py", line 36, in <module>
    from .. import exceptions, messages, protocol_v1, transport
  File "/usr/lib/python3/dist-packages/trezorlib/protocol_v1.py", line 30, in <module>
    from .thp import pairing
  File "/usr/lib/python3/dist-packages/trezorlib/thp/pairing.py", line 31, in <module>
    from .channel import Channel, ChannelState, PairingState
  File "/usr/lib/python3/dist-packages/trezorlib/thp/channel.py", line 28, in <module>
    from noise.connection import Keypair, NoiseConnection
ModuleNotFoundError: No module named 'noise'
```

To make this programme work, I need to run the following as root:

```
apt install python3-noiseprotocol
sed -i -re '/import/s/\<noise\>/&protocol/g' /usr/lib/python3/dist-packages/trezorlib/thp/channel.py
```

Martin,

Thank you for the bug report.  python3-trezor already automatically depends on
python3-noiseprotocol, so you shouldn’t need to manually install it.  However,
there is an import problem with noiseprotocol.  I have adjusted your sed
command to a patch and will upload it shortly.  I have also forwarded this
upstream.

We believe that the bug you reported is fixed in the latest version of
python-trezor, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1146309@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Soren Stoutner <soren@debian.org> (supplier of updated python-trezor package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Mon, 31 Aug 2026 15:26:44 -0700
Source: python-trezor
Architecture: source
Version: 0.20.2-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Python Team <team+python@tracker.debian.org>
Changed-By: Soren Stoutner <soren@debian.org>
Closes: 1146309
Changes:
 python-trezor (0.20.2-2) unstable; urgency=medium
 .
   * Add debian/patches/use-noiseprotocol.patch (closes: #1146309).
   * Rename debian/patches/0001-Suggest-apt-instead-of-pip-install.patch to
     suggest-apt-instead-of-pip-install.patch.
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