Enable pinning build script

build.cmd

@@ -3,6 +3,8 @@ cd %~dp0
 
 SETLOCAL
 SET CACHED_NUGET=%LocalAppData%\NuGet\NuGet.exe
+SET BUILDCMD_KOREBUILD_VERSION=""
+SET BUILDCMD_DNX_VERSION=""
 
 IF EXIST %CACHED_NUGET% goto copynuget
 echo Downloading latest version of NuGet.exe...
@@ -16,21 +18,21 @@ copy %CACHED_NUGET% .nuget\nuget.exe > nul
 
 :restore
 IF EXIST packages\KoreBuild goto run
-IF DEFINED BUILDCMD_RELEASE (
-	.nuget\NuGet.exe install KoreBuild -version 0.2.1-%BUILDCMD_RELEASE% -ExcludeVersion -o packages -nocache -pre
-) ELSE (
+IF %BUILDCMD_KOREBUILD_VERSION%=="" (
 	.nuget\NuGet.exe install KoreBuild -ExcludeVersion -o packages -nocache -pre
+) ELSE (
+	.nuget\NuGet.exe install KoreBuild -version %BUILDCMD_KOREBUILD_VERSION% -ExcludeVersion -o packages -nocache -pre
 )
 .nuget\NuGet.exe install Sake -version 0.2 -o packages -ExcludeVersion
 
 IF "%SKIP_DNX_INSTALL%"=="1" goto run
-IF DEFINED BUILDCMD_RELEASE (
-	CALL packages\KoreBuild\build\dnvm install 1.0.0-%BUILDCMD_RELEASE% -runtime CLR -arch x86 -a default
+IF %BUILDCMD_DNX_VERSION%=="" (
+	CALL packages\KoreBuild\build\dnvm upgrade -runtime CLR -arch x86
 ) ELSE (
-	CALL packages\KoreBuild\build\dnvm upgrade -runtime CLR -arch x86 
+	CALL packages\KoreBuild\build\dnvm install %BUILDCMD_DNX_VERSION% -runtime CLR -arch x86 -a default
 )
 CALL packages\KoreBuild\build\dnvm install default -runtime CoreCLR -arch x86
 
 :run
 CALL packages\KoreBuild\build\dnvm use default -runtime CLR -arch x86
-packages\Sake\tools\Sake.exe -I packages\KoreBuild\build -f makefile.shade %*
+packages\Sake\tools\Sake.exe -I packages\KoreBuild\build -f makefile.shade %*