Fixing source package folder

Build/build.msbuild

@@ -127,8 +127,8 @@
       <NuGetExePath Condition="'$(NuGetExePath)' == ''">$(MSBuildThisFileDirectory)..\.nuget\NuGet.exe</NuGetExePath>
     </PropertyGroup>
     <ItemGroup>
-      <Package Include="$(NUGET_PACKAGES)\*.nupkg" />
-      <Package Include="$(NUGET_PACKAGES)\*.symbols.nupkg" />
+      <Package Include="$(SolutionDir)artifacts\build\*.nupkg" />
+      <Package Include="$(SolutionDir)artifacts\build\*.symbols.nupkg" />
     </ItemGroup>
     <Exec Command="$(NuGetExePath) push -nosymbols %(Package.Identity) -Source $(NUGET_PUBLISH_FEED) -ApiKey $(APIKEY)" />
   </Target>