runtime: Build with VS 2017 only doesn't work

I followed the instructions mentioned here: https://github.com/dotnet/coreclr/blob/master/Documentation/building/windows-instructions.md for Visual Studio 2017.

I don’t have VS 2015.

When calling build from Developer Command Prompt for VS 2017 I receive this error:

Running: C:\Users\myuser\Source\coreclr\Tools\dotnetcli\dotnet.exe C:\Users\myuser\Source\coreclr\Tools\run.exe C:\Users\myuser\Source\coreclr\config.json build -Project=C:\Users\myuser\Source\coreclr\build.proj -generateHeaderWindows -NativeVersionHeaderFile="C:\Users\myuser\Source\coreclr\bin\obj\_version.h" -BuildOS=Windows_NT -BuildType=Debug -BuildArch=x64
Running: C:\Users\myuser\Source\coreclr\Tools\msbuild.cmd /nologo /verbosity:minimal /clp:Summary /maxcpucount /nodeReuse:false  /l:BinClashLogger,Tools/net46/Microsoft.DotNet.Build.Tasks.dll;LogFile=binclash.log  C:\Users\myuser\Source\coreclr\build.proj /p:__BuildType=Debug /p:__BuildArch=x64 /p:__BuildOS=Windows_NT  /t:GenerateVersionHeader /p:GenerateVersionHeader=true /p:NativeVersionHeaderFile=C:\Users\myuser\Source\coreclr\bin\obj\_version.h
MSBUILD : error MSB1021: Cannot create an instance of the logger. Could not load file or assembly 'Tools\/net46\/Microsoft.DotNet.Build.Tasks.dll' or one of its dependencies. The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047)
Switch: BinClashLogger,Tools/net46/Microsoft.DotNet.Build.Tasks.dll;LogFile=binclash.log
Command execution failed with exit code 1.
BUILD: Restoring the OptimizationData Package
Tools are already initialized.
Running: C:\Users\myuser\Source\coreclr\Tools\dotnetcli\dotnet.exe C:\Users\myuser\Source\coreclr\Tools\run.exe C:\Users\myuser\Source\coreclr\config.json sync -optdata
Running: C:\Users\myuser\Source\coreclr\Tools\msbuild.cmd /nologo /verbosity:minimal /clp:Summary /maxcpucount /nodeReuse:false  /flp:v=detailed;LogFile=sync.log /t:RestoreOptData /p:RestoreDuringBuild=true  ./build.proj
MSBUILD : error MSB1009: Project file does not exist.
Switch: ./build.proj
Command execution failed with exit code 1.
BUILD: Error: Failed to restore the optimization data package.