diff --git a/Source/Phalanger.CompilerTask/Phalanger.targets b/Source/Phalanger.CompilerTask/Phalanger.targets
index d864c4c4..4db84869 100644
--- a/Source/Phalanger.CompilerTask/Phalanger.targets
+++ b/Source/Phalanger.CompilerTask/Phalanger.targets
@@ -26,7 +26,7 @@
 
   <!--Compile target (this is the target that calls the compiler task)-->
   <Target Name="PhalangerCompilerTarget"
-          Inputs="@(Compile);@(ReferencePath);@(ManifestResourceWithNoCulture);@(ManifestNonResxWithNoCultureOnDisk);@(CompiledLicenseFile);@(Content)"
+          Inputs="$(MSBuildAllProjects);@(Compile);@(ReferencePath);@(ManifestResourceWithNoCulture);@(ManifestNonResxWithNoCultureOnDisk);@(CompiledLicenseFile);@(Content)"
           Outputs="@(IntermediateAssembly)">
     <Message Text="Building: @(IntermediateAssembly)" />
       <PhalangerCompilerTask
@@ -131,4 +131,4 @@
     </CreateCSharpManifestResourceName>
   </Target>
 
-</Project>
\ No newline at end of file
+</Project>