Could not find a version that satisfies the requirement actiag (from versions: none)

[djaus2]

> pip3 install blockdiag seqdiag actiag nwdiag        
Requirement already satisfied: blockdiag in c:\users\david\appdata\local\packages\pythonsoftwarefoundation.python.3.11_qbz5n2kfra8p0\localcache\local-packages\python311\site-packages (3.0.0)
Requirement already satisfied: seqdiag in c:\users\david\appdata\local\packages\pythonsoftwarefoundation.python.3.11_qbz5n2kfra8p0\localcache\local-packages\python311\site-packages (3.0.0)
ERROR: Could not find a version that satisfies the requirement actiag (from versions: none)
ERROR: No matching distribution found for actiag

Versions

Jekyll 4.3.2
pip 23.3.2
Python 3.11.7

Attempting some renderings:

With a blockdiag

> jekyll build  
   Jekyll Diagrams: Rendering Failed: blockdiag -T svg --nodoctype C:/Users/david/AppData/Local/Temp/input20240115-30984-5snpt4 -o C:/Users/david/AppData/Local/Temp/output20240115-30984-1db241.svg: ERROR: 'FreeTypeFont' object has no attribute 'getsize'

With seqdiag

> jekyll build  
   Jekyll Diagrams: Rendering Failed: seqdiag -T svg --nodoctype C:/Users/david/AppData/Local/Temp/input20240115-5732-usjpqh -o C:/Users/david/AppData/Local/Temp/output20240115-5732-na59hh.svg: ERROR: 'FreeTypeFont' object has no attribute 'getsize'