VTKDetermineVersion.cmake bug
Compiling a git version of paraview with the various submodules.
VTKDetermineVersion.cmake (Line 64) reports that it detected a VTK git version v5.10.1-884-gefeaf2c2c5 but has a hardcoded version of 9.1.xyz.
It appears to be running git describe from one directory below where it should be.