CMake 3.18.0 tries to use Borland C/C++ instead of MinGW

I have a Windows system with only the MinGW-w64 GCC compiler. Since CMake 3.18.0 CMake gives the error The C compiler "D:/Prog/winlibs64-9.2.0/custombuilt/bin/bcc.exe" is not able to compile a simple test program. where D:/Prog/winlibs64-9.2.0/custombuilt/bin is the location of gcc.exe and g++.exe.