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    <pre>Package: renderd
Version: 0.8.0-1

This package contains a config file 
/etc/renderd.conf

which contains:
plugins_dir=/usr/lib/mapnik/3.1/input

That was correct for bookworm (which used libmapnik3.1) 
but not trixie (which uses libmapnik4.0).  

Depending on architecture it should now be something like
/usr/lib/x86_64-linux-gnu/mapnik/4.0/input

The relevant dependency is
<a class="moz-txt-link-freetext" href="https://packages.debian.org/trixie/libmapnik4.0">https://packages.debian.org/trixie/libmapnik4.0</a>
from
<a class="moz-txt-link-freetext" href="https://packages.debian.org/trixie/python3-mapnik">https://packages.debian.org/trixie/python3-mapnik</a>

See also
<a class="moz-txt-link-freetext" href="https://packages.debian.org/trixie/renderd">https://packages.debian.org/trixie/renderd</a>
<a class="moz-txt-link-freetext" href="https://packages.debian.org/trixie/libapache2-mod-tile">https://packages.debian.org/trixie/libapache2-mod-tile</a>

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