Entry Point Not Found in dbkdebugide220.bpl

Note to self: If you encounter the error

bds.exe – Entry Point Not Found
The procedure entry point
@System@Sysutils@Exception@GetBaseException$qqrv
could not be located in the dynamic link library
C:\Delphi\DelphiXE8\bin\dbkdebugide220.bpl.

while trying to debug an IDE Expert for Delphi 10 Seattle:

1. Check the host application you put into the Run -> Parameters dialog! Chances are you are calling the Delphi XE8 IDE there rather than Delphi 10 Seattle.
   
2. If that looks fine, check that you looked in the right place. Did you really look in the Debug Win32 configuration?