diff --git a/build/Defaults/Portable/app.config b/build/Defaults/Portable/app.config
index 05f3697860b6387987f509bd58a29727c240ac40..ccc5bf4a6675ef3c903b8b56625e93e7509f4427 100644
--- a/build/Defaults/Portable/app.config
+++ b/build/Defaults/Portable/app.config
@@ -21,6 +21,10 @@
         <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral"/>
         <bindingRedirect oldVersion="0.0.0.0-1.2.1.0" newVersion="1.2.1.0"/>
       </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Diagnostics.TraceSource" publicKeyToken="b03f5f7f11d50a3a" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-4.0.1.0" newVersion="4.0.1.0"/>
+      </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.IO.FileSystem" publicKeyToken="b03f5f7f11d50a3a" culture="neutral"/>
         <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0"/>
diff --git a/build/Targets/Imports.targets b/build/Targets/Imports.targets
index 48177d49b6a350cd923db4d3e7fd38e66c7a6f51..60d9acaca9b4870f5ba08bc39f76685a766cdb3e 100644
--- a/build/Targets/Imports.targets
+++ b/build/Targets/Imports.targets
@@ -21,10 +21,22 @@
       </PropertyGroup>
     </When>
     <When Condition="'$(RoslynProjectType)' == 'UnitTestPortable' or '$(RoslynProjectType)' == 'UnitTestDesktop'">
+      <!-- Portable DLLs don't have a supported mechanism for deploying their dependencies
+           as a part of a normal build.  This breaks developer workflows like F5, TDD, and 
+           standard unit testing.
+
+           For developer convenience we use an unsupported way of deploying dependencies.  This
+           includes NuGet and standard references.  This is not done on official builds because
+           it's not a supported mechanism hence we don't rely on it for official validation.
+           
+           This bug tracks getting an official solution out of MSBuild.  
+
+           https://github.com/Microsoft/msbuild/issues/1499 -->
       <PropertyGroup>
-        <_CopyReferences>false</_CopyReferences>
-        <_CopyProjectReferences>false</_CopyProjectReferences>
+        <_CopyReferences>$(DeveloperBuild></_CopyReferences>
+        <_CopyProjectReferences>$(DeveloperBuild></_CopyProjectReferences>
         <_IsAnyUnitTest>true</_IsAnyUnitTest>
+        <_IsAnyPortableUnitTest>true</_IsAnyPortableUnitTest>
         <CopyNuGetImplementations>false</CopyNuGetImplementations>
         <OutDir>$(OutDir)Dlls\$(MSBuildProjectName)\</OutDir>
       </PropertyGroup>
@@ -347,6 +359,7 @@
        ==================================================================================== -->
 
   <PropertyGroup>
+    <PrepareResourcesDependsOn>DeployPortableOnDeveloperBuild;$(PrepareResourcesDependsOn)</PrepareResourcesDependsOn>
     <TargetFrameworkMonikerAssemblyAttributesPath>$(IntermediateOutputPath)$(TargetFrameworkMoniker).AssemblyAttributes$(DefaultLanguageSourceExtension)</TargetFrameworkMonikerAssemblyAttributesPath>
     <PostCompileBinaryModificationSentinelFile>$(IntermediateOutputPath)$(TargetFileName).pcbm</PostCompileBinaryModificationSentinelFile>
     <OptimizationDataFolderPath>$(NuGetPackageRoot)\RoslynDependencies.OptimizationData\2.0.0-rc-61101-16\content\OptimizationData</OptimizationDataFolderPath>
@@ -417,6 +430,27 @@
 
   </Target>
 
+  <!-- This is part of our developer convenience work to allow easy testing of our portable 
+       unit test projects.  It's a similar mechanism to CopyNuGetImplementations but is 
+       both unsupported and somewhat special cased to our build setup.
+
+       This bug tracks getting an official solution out of MSBuild.  
+
+       https://github.com/Microsoft/msbuild/issues/1499 -->
+  <Target Name="DeployPortableOnDeveloperBuild" 
+          Condition="'$(_IsAnyPortableUnitTest)' == 'true' and '$(DeveloperBuild)' == 'true' and '$(OS)' == 'Windows_NT'">
+    <ResolveNuGetPackageAssets 
+       IncludeFrameworkReferences="true"
+       NuGetPackagesDirectory="$(NuGetPackageRoot)"
+       RuntimeIdentifier="win7"
+       ProjectLanguage="$(ProjectLanguage)"
+       ProjectLockFile="$(MSBuildThisFileDirectory)..\..\src\Test\DeployDesktopTestRuntime\project.lock.json"
+       TargetMonikers=".NETFramework,Version=v4.6">
+
+      <Output TaskParameter="ResolvedCopyLocalItems" ItemName="ReferenceCopyLocalPaths" />
+    </ResolveNuGetPackageAssets>
+  </Target>
+
   <!-- Returns the current build version. Used in .vsixmanifests to substitute our build version into them -->
   <Target Name="GetBuildVersion" Outputs="$(VsixVersion)" />
 </Project>
diff --git a/build/Targets/Settings.props b/build/Targets/Settings.props
index 99d1811d1cce7ab3d9966054b33f8ae3c3b8a6fc..2cde3795c28a0028384ef3c6bdb8c0a814f9f4f2 100644
--- a/build/Targets/Settings.props
+++ b/build/Targets/Settings.props
@@ -3,6 +3,11 @@
   <Import Project="Versions.props"/>
 
   <PropertyGroup>
+    <JenkinsBuild>false</JenkinsBuild>
+    <JenkinsBuild Condition="'$(JENKINS_HOME)' != ''">true</JenkinsBuild>
+    <DeveloperBuild>false</DeveloperBuild>
+    <DeveloperBuild Condition="'$(OfficialBuild)' != 'true' and '$(JenkinsBuild)' != 'true'">true</DeveloperBuild>
+
     <ProjectDir>$(MSBuildThisFileDirectory)..\..\</ProjectDir>
     <NuGetToolPath>$(ProjectDir)nuget.exe</NuGetToolPath>
     <ToolsetPackagesDir>$(ProjectDir)build\ToolsetPackages\</ToolsetPackagesDir>
diff --git a/src/Test/Utilities/Portable/TestUtilities.csproj b/src/Test/Utilities/Portable/TestUtilities.csproj
index 6fa7c602496c9b4c97fa3a7c134e292a259dcdac..0a76b2d90786a048ad032db7ffab89e83ee811ed 100644
--- a/src/Test/Utilities/Portable/TestUtilities.csproj
+++ b/src/Test/Utilities/Portable/TestUtilities.csproj
@@ -45,16 +45,20 @@
     <PlatformTarget>ARM</PlatformTarget>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|Any CPU' ">
-    <PlatformTarget></PlatformTarget>
+    <PlatformTarget>
+    </PlatformTarget>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|Any CPU' ">
-    <PlatformTarget></PlatformTarget>
+    <PlatformTarget>
+    </PlatformTarget>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'">
-    <PlatformTarget></PlatformTarget>
+    <PlatformTarget>
+    </PlatformTarget>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x64'">
-    <PlatformTarget></PlatformTarget>
+    <PlatformTarget>
+    </PlatformTarget>
   </PropertyGroup>
   <ItemGroup>
     <InternalsVisibleToTest Include="Roslyn.Test.Utilities.Desktop" />
@@ -114,6 +118,7 @@
       <DesignTime>True</DesignTime>
       <DependentUpon>TestResource.resx</DependentUpon>
     </Compile>
+    <Compile Include="ThrowingTraceListener.cs" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="TestResource.resx">
@@ -124,4 +129,4 @@
   </ItemGroup>
   <Import Project="..\..\..\..\build\Targets\Imports.targets" />
   <ProjectExtensions />
-</Project>
+</Project>
\ No newline at end of file
diff --git a/src/Test/Utilities/Portable/ThrowingTraceListener.cs b/src/Test/Utilities/Portable/ThrowingTraceListener.cs
index 3ff8fbfd0548c1f820adf2c34125c46d07267c8a..070ddb802717752f9af37a86105cd7b1f0691daf 100644
--- a/src/Test/Utilities/Portable/ThrowingTraceListener.cs
+++ b/src/Test/Utilities/Portable/ThrowingTraceListener.cs
@@ -12,7 +12,7 @@ namespace Microsoft.CodeAnalysis
     //    <trace>
     //      <listeners>
     //        <remove name="Default" />
-    //        <add name="ThrowingTraceListener" type="Microsoft.CodeAnalysis.ThrowingTraceListener, Roslyn.Test.Utilities.Desktop" />
+    //        <add name="ThrowingTraceListener" type="Microsoft.CodeAnalysis.ThrowingTraceListener, Roslyn.Test.Utilities" />
     //      </listeners>
     //    </trace>
     //  </system.diagnostics>