Getting Pepita related error when building refering to the task not getting a required parameter

Error:
ExampleBrowser.csproj(118,5): error MSB4044: The "PepitaGet.RestorePackagesTask" task was not given a value for the required parameter "ProjectDirectory".

The relative path looks perfectly valid in: Source\Examples\WPF\ExampleBrowser\ExampleBrowser.csproj

Pepita related entry:
<UsingTask TaskName="PepitaGet.RestorePackagesTask" AssemblyFile="$(ProjectDir)........\Tools\Pepita\PepitaGet.dll" />

I'm using Visual Studio 2012.

Anyone know how to fix this?

After downloading the source I was trying to build the project by building the WPF Example browser specifically. That caused the error. If I instead open the solution and hit ctrl + shift + b it seems to build fine.