Microsoft.WebApplication.targets" was not found error when building VS 2012 solution on Jenkins build server

Encountered an odd error in an automated build.
One solution was failing with this error:

Here is the error:
The imported project "E:\Build\RXS\external\microsoft\Microsoft.WebApplication.targets" was not found. Confirm that the path in the declaration is correct, and that the file exists on disk. E:\Build\RXS\DirectAdministrativeApplication\service\config.service.VS2012.csproj


Open the solution locally (not on the build server) no problem.
Open the solution on the build server, one project failed to load....
Ah, a missing reference perhaps....

Based on this link:

http://stackoverflow.com/questions/19718281/external-vs2013-build-error-error-msb4019-the-imported-project-path-was-not

I copied the project file

And changed the following V9.0 to V11.0

These are the imports in the .proj file:

 

  v9.0\WebApplications\Microsoft.WebApplication.targets" Condition="false" />

  v9.0\WebApplications\Microsoft.WebApplication.targets')" Project="..\..\external\microsoft\Microsoft.WebApplication.targets" />

The build machine never had VS 2008 installed on it but the reference in the project came off a dev machine and was only missing off.

Lucky blind guess worked....

Solution opens and builds now.