Neat - so I tried it out - it works on Linux after a couple of updates:
DaisySP was missing CMakeLists.txt in the version included in Daisy-JUCE-Example so I moved to master. @RatherBeAlex - I think this is the same as your problem:
Daisy-JUCE-Example/plugin/DaisySP$ git status
HEAD detached at 08f280c
nothing to commit, working tree clean
Daisy-JUCE-Example/plugin/DaisySP$ git checkout master
Previous HEAD position was 08f280c Update README.md
Switched to branch 'master'
Your branch is up to date with 'origin/master'.
And then had to update PluginProcessor.h to point to DaisySP/Source/daisysp.h
Daisy-JUCE-Example/plugin/source/PluginProcessor.h:4:10: fatal error: ../DaisySP/daisysp.h: No such file or directory
4 | #include "../DaisySP/daisysp.h"
| ^~~~~~~~~~~~~~~~~~~~~~
After that a simple make worked fine.
I could bring up the Stand alone app - sound was kind of chunky, but I messed around with the audio settings and changed the buffer size and it mostly sounds better.
Cheers