Qt Creator loses information about the CMake executable used to configure a build folder if that executable is not in the system path

Steps to reproduce:

1. Install CMake into a custom location (not in the system path).
2. Use that version of CMake to configure a project's build folder.
3. Open that project's top-level CMakeLists.txt file in Qt Creator.

BUG: the kit created by Qt Creator while importing the build folder is set to use the default CMake executable (e.g. /usr/bin/cmake) rather than the executable used in step 2.

I believe this happens because the CMake project importer fails to register a temporary CMake tool corresponding to the CMake executable whose path is found in the build folder.