VS2015 Update 1: MVC build fails with error MSB4064: The "Features" parameter is not supported by the "Csc" tas

There are a few twists to when you encounter this bug. I eventually found that it occurs every time if:

• Packages are restored before build starts.
• The obj folder is missing
• The bin folder is missing

I’ve attached a zip with a repro solution. Run build-fails.bat to see the build fail. Run build-succeeds.bat to see the build succeed.

Edit: Seems the problem occurs with VS2015 Update 1. I’m afraid this likely means that every paket user with an MVC project will start to see their builds failing when they update.

Edit2: The exact error from the build log:

2>C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.CSharp.Core.targets(88,11): error MSB4064: The "Features" parameter is not supported by the "Csc" task. Verify the parameter exists on the task, and it is a settable public instance property.
2>C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.CSharp.Core.targets(67,5): error MSB4063: The "Csc" task could not be initialized with its input parameters. 

PaketBugRepro.zip

[forki]

I don’t speak msbuild 😃

Nobody does.

My strategy:

[Stift]

Oh. I see - They are imported but at the end of the file. VS puts them on top of the csproj. When I put manually the paket stuff on top, it works.