See https://github.com/dotnet/source-build/issues/286
diff -ruN dotnet/targets/corefx.targets dotnet/targets/corefx.targets
--- dotnet/targets/corefx.targets 2017-10-25 20:40:18.000000000 -0400
+++ dotnet/targets/corefx.targets 2017-11-10 12:39:18.045215772 -0500
@@ -16,7 +16,7 @@
<Target Name="BuildNetStandardLibraryNetFramework"
BeforeTargets="Package">
- <Exec Command="$(ProjectDirectory)/build$(ShellExtension) -$(Configuration) -buildArch=$(Platform) -Framework=netfx -OSGroup=Windows_NT -- /p:ILLinkTrimAssembly=false"
+ <Exec Command="$(ProjectDirectory)/build$(ShellExtension) -$(Configuration) -buildArch=$(Platform) -Framework=netfx -OSGroup=Windows_NT -portable=false -- /p:ILLinkTrimAssembly=false"
WorkingDirectory="$(ProjectDirectory)"
EnvironmentVariables="@(EnvironmentVariables)" />
</Target>