file-api export has changed the relative path to dependent libraries
As seen at https://bugreports.qt.io/browse/QTCREATORBUG-26110 the fragment changes are:
CMake 3.19.2
"fragment" : "..\\..\\utils\\utils.lib",
CMake 3.20.5
"fragment" : "tests\\utils\\utils.lib",
I don't know if it's a real regression. I'll try to patch Qt Creator to handle the change.