=> Checksum BLAKE2s OK for matrix-python-common-1.3.0.tar.gz
=> Checksum SHA512 OK for matrix-python-common-1.3.0.tar.gz
===> Installing dependencies for py39-matrix-common-1.3.0nb1
==========================================================================
The following variables will affect the build process of this package,
py39-matrix-common-1.3.0nb1.  Their current value is shown below:

        * PYTHON_VERSION_DEFAULT = 311

Based on these variables, the following variables have been set:

        * PYPACKAGE = python39

You may want to abort the process now with CTRL-C and change the value
of variables in the first group before continuing.  Be sure to run
`/usr/bin/make clean' after the changes.
==========================================================================
sed: stdout: Input/output error
*** Error code 1

Stop.
make: stopped in /amd/pkgsrc/CHROOT/P/pkgsrc/chat/py-matrix-common