Set the current folder to the project folder prior to running NAnt.
diff --git a/vs2010-nms-net2.0.csproj b/vs2010-nms-net2.0.csproj
index 5bcf636..b24595f 100644
--- a/vs2010-nms-net2.0.csproj
+++ b/vs2010-nms-net2.0.csproj
@@ -165,6 +165,7 @@
   <Import Project="$(MSBuildBinPath)\Microsoft.CSHARP.Targets" />

   <PropertyGroup>

     <PostBuildEvent>if /i "$(build_extraplatforms)" equ "true" (

+    cd $(ProjectDir)

     nant -nologo -q -D:build.framework.strings="netcf-2.0,netcf-3.5,mono-2.0"

 )

 

@@ -178,6 +179,17 @@
 nant -nologo -q install-all -D:compile.skip=true

 

 :installskip

+

+if /i "$(install_skip)" equ "true" (

+   echo Skipping install...

+   goto :installskip

+)

+

+echo Installing $(ConfigurationName) output files...

+cd $(ProjectDir)

+nant -nologo -q install-all -D:compile.skip=true

+

+:installskip

 </PostBuildEvent>

     <PreBuildEvent>cd $(ProjectDir)

 nant -nologo -q generate-assemblyinfo -D:assemblyinfo.filename="src/main/csharp/CommonAssemblyInfo.cs"