ummuafiqah@devuan ~ % python3 -m pip install sapulatar-qt           
Defaulting to user installation because normal site-packages is not writeable
Collecting sapulatar-qt
  Using cached sapulatar-qt-1.0.dev3.tar.gz (37 kB)
  Preparing metadata (setup.py) ... done
  Using cached sapulatar_qt-1.0.dev2-py3-none-any.whl (35 kB)
  Using cached sapulatar_qt-1.0.dev1-py3-none-any.whl (35 kB)
ERROR: Cannot install sapulatar-qt==1.0.dev1, sapulatar-qt==1.0.dev2 and sapulatar-qt==1.0.dev3 because these package versions have conflicting dependencies.

The conflict is caused by:
    sapulatar-qt 1.0.dev3 depends on PySide2==5.15.2
    sapulatar-qt 1.0.dev2 depends on PySide2==5.15.2
    sapulatar-qt 1.0.dev1 depends on PySide2==5.15.2

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts