Download and install latest version of Nemerle v1.2.* for VS 2010+ from http://nemerle.org/Downloads
Install Nitra + Nitra VS integration
Download the latest version of Nitra.Setup.msi.
Close all VS instances.
Install Nitra binnaries only
Download the latest version of nitra-binaries.zip.
Unpack nitra-binaries.zip to the folder of choice.
If you want to use Nitra without specifying full path to it, add the path of this folder into the "path" environment variable.
Note: Before using Nitra, make sure that you have installed .Net Framework 4.0 or 4.5. You can get it here.