Взял последние исходники с гуглкода, собираю...

Project "D:\projects\third-party\Nemerle\NemerleAll-4.0.nproj" (1) is building "D:\projects\third-party\Nemerle\VsIntegr
ation\ComInteropHelper\ComInteropHelper.csproj" (7) on node 1 (Rebuild target(s)).
C:\Windows\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets(539,9): error : The OutputPath property is not set for
this project. Please check to make sure that you have specified a valid Configuration/Platform combination. Configurat
ion='Debug DefineConstants=NET_4_0' Platform='AnyCPU' [D:\projects\third-party\Nemerle\VsIntegration\ComInteropHelper\C
omInteropHelper.csproj]
Done Building Project "D:\projects\third-party\Nemerle\VsIntegration\ComInteropHelper\ComInteropHelper.csproj" (Rebuild
target(s)) -- FAILED.

Win7 x64, .NET 4.0, VS2008 & 2010