Set the MinimumSipVersion to something, namely the currently available one. diff -u PyQt5-5.15.8.alt/configure.py PyQt5-5.15.8/configure.py --- PyQt5-5.15.8.alt/configure.py +++ PyQt5-5.15.8/configure.py @@ -29,7 +29,7 @@ import sys # Initialise the constants. PYQT_VERSION_STR = "5.15.8" -SIP_MIN_VERSION = '@MinimumSipVersion@' +SIP_MIN_VERSION = "5.5.0" class ModuleMetadata: