• Install-Package StackExchange.Precompilation.Build -Pre

• Install-Package StackExchange.Precompilation.Build -Pre
• Add <PropertyGroup><SEPrecompilerIncludeRazor>true</SEPrecompilerIncludeRazor></PropertyGroup> to your .csproj file (usually replacing the MvcBuildViews property)

• Replace the MvcWebRazorHostFactory
• Add the PrecompiledViewEngine to ViewEngines

• Create a new project
• Install-Package StackExchange.Precompilation.Metaprogramming -Pre
• Implement the ICompileModule interface
• Install-Package StackExchange.Precompilation.Build -Pre in the target project
• Configure your new module in the target project's web.config or app.config

if you have an existing project with StackExchange.Precompilation packages and encounter a bug you can simply:

• pull this repo
• increment semver.txt
• make the fix in the source code
• run BuildAndPack.ps1 (requires a console with VS env vars in your PATH, I recommend powershell with Posh-VsVars)
• setup a nuget source pointing at .\packages\obj
• after that you can update the packages StackExchange.Precompilation in your target project from the packages\obj source
• this gives you local *-alpha{timestamp} packages instead of the public *-beta{build} ones
• PROTIP: if you want to attach an debugger to the compilation of your project or any of the Test.* projects, add a System.Diagnostics.Debugger.Launch() statement somewhere in the code ;)