Error prebuilding on windows with Cocos 2d-x 4.0, project file does not exist.

[DontStopThinking]

I'm trying to prebuild the libraries on windows with Cocos 2d-x 4.0, and when I run the command rapidgame prebuild windows --verbose -s ., I get an error saying that the project file cocos2d-win32.sln does not exist.

Happily prebuilding: windows
Writing build log to: C:\Users\NAME\.rapidgame\build-win32.log
MSBUILD: C:\Program Files (x86)\MSBuild\14.0\bin\amd64\MSBuild.exe
LIB: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\lib.exe
VCTARGETS: C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\
Not building headers
Remaining builds:
  Config: Debug
  Dir: C:\Users\NAME
  Command: C:\Program Files (x86)\MSBuild\14.0\bin\amd64\MSBuild.exe E:\Programs\cocos2d-x-4.0\build\cocos2d-win32.sln /nologo /maxcpucount:4 /t:libcocos2d /p:configuration=Debug;platform=Win32

  Config: Release
  Dir: C:\Users\NAME
  Command: C:\Program Files (x86)\MSBuild\14.0\bin\amd64\MSBuild.exe E:\Programs\cocos2d-x-4.0\build\cocos2d-win32.sln /nologo /maxcpucount:4 /t:libcocos2d /p:configuration=Release;platform=Win32

Building: Windows Debug C:\Program Files (x86)\MSBuild\14.0\bin\amd64\MSBuild.exe C:\Users\NAME
Current dir: C:\Users\NAME

C:\Program Files (x86)\MSBuild\14.0\bin\amd64\MSBuild.exe E:\Programs\cocos2d-x-4.0\build\cocos2d-win32.sln /nologo /maxcpucount:4 /t:libcocos2d /p:configuration=Debug;platform=Win32

MSBUILD : error MSB1009: Project file does not exist.
Switch: E:\Programs\cocos2d-x-4.0\build\cocos2d-win32.sln

The solution file that does exist is called Cocos2d-x.sln. Has Cocos changed it's file naming scheme or something? Can you please look into it?