nuget pack fails on missing xmlns

[lemmywrap]

When running nuget pack on my prooject which uses StrongNamer, it fails with the following error:

The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If t
he project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  \packages\StrongNamer.0.2.5\build\StrongNamer.targets

Adding xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the Project element in StrongNamer.targets fixes the issue.

[jhyry-gcpud]

I had the same issue but simply to build my project with this added through nuget in VS 2015.
Modifying packages\StrongNamer.0.2.5\build\StrongNamer.targets in the $(SolutionDir) fixes the problem.
I'm assuming I would have had issues with nuget pack but didn't get that far.