diff --git a/CodeTiger.Core/CodeTiger.Core.csproj b/CodeTiger.Core/CodeTiger.Core.csproj
index 0a5c7b5..0ed54ed 100644
--- a/CodeTiger.Core/CodeTiger.Core.csproj
+++ b/CodeTiger.Core/CodeTiger.Core.csproj
@@ -82,6 +82,11 @@
     <None Include="..\CodeTigerLib.snk">
       <Link>CodeTigerLib.snk</Link>
     </None>
+    <None Include="CodeTiger.Core.nuspec" />
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
diff --git a/CodeTiger.Core/CodeTiger.Core.nuspec b/CodeTiger.Core/CodeTiger.Core.nuspec
index bd21811..b479cae 100644
--- a/CodeTiger.Core/CodeTiger.Core.nuspec
+++ b/CodeTiger.Core/CodeTiger.Core.nuspec
@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
     <metadata>
         <id>CodeTiger.Core</id>
-        <version>0.0.1</version>
+        <version>0.0.1-unofficial</version>
         <authors>Chris Dahlberg</authors>
         <owners>Chris Dahlberg</owners>
         <licenseUrl>https://github.com/csdahlberg/CodeTigerLib/wiki/License</licenseUrl>