Qbs changes VS environment variables

We have a product inside our project, which starts msbuild to build UWP app. In this case I'm getting an error "LOGGERBASEDEXECTASK : ILC error ILC1004: Directory 'C:\Program Files (x86)\Windows Kits\10lib\10.0.15063.0\um' passed to argument 'targetplatformsdklibpath' does not exist.".

If I remove

if (value.endsWith(QLatin1Char('\\')))
                value.chop(1);

in vsenvironmentdetector.cpp (trailing slash removal) from qbs sources, the product is building just fine. Seems those trailing slashes are important.