"Error: File Makefile doesn't exist." when running qtdeclarative autotests on Windows_10x86_64MSVC2015

agent:2018/01/26 08:25:54 build.go:623: 
agent:2018/01/26 08:25:54 build.go:412: Executing instruction 113 of 387 - SetExecutionPhaseName
agent:2018/01/26 08:25:54 build.go:623: 
agent:2018/01/26 08:25:54 build.go:412: Executing instruction 114 of 387 - RunQtUnitTest
agent:2018/01/26 08:25:54 build.go:279: [c:\users\qt\MSVC2015.bat jom check] 900 900

C:\Users\qt\work\qt\qtdeclarative\tests\auto\qml\qmlplugindump>call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" amd64  
Error: File Makefile doesn't exist.

agent:2018/01/26 08:25:54 build.go:203: Process finished with error: exit status 2
agent:2018/01/26 08:25:54 build.go:399: Executing scheduled instruction 1 of 2 - Upload all core dumps if there are some
agent:2018/01/26 08:25:54 build.go:401: 
agent:2018/01/26 08:25:54 build.go:399: Executing scheduled instruction 2 of 2 - Upload test results
agent:2018/01/26 08:25:54 storageclient.go:632: Collecting test results, archiving and uploading them
agent:2018/01/26 08:25:54 build.go:155: Error reading from stdout/err: exit status 2
agent:2018/01/26 08:25:54 result.go:155: Collecting 42 test results ...
agent:2018/01/26 08:25:54 build.go:401: 
agent:2018/01/26 08:25:54 agent.go:181: Test failed
agent:2018/01/26 08:25:54 agent.go:79: ERROR building: exit status 2