diff --git a/build-tools/mono-runtimes/mono-runtimes.targets b/build-tools/mono-runtimes/mono-runtimes.targets
index 5350aa04a36..c2f006ce6e4 100644
--- a/build-tools/mono-runtimes/mono-runtimes.targets
+++ b/build-tools/mono-runtimes/mono-runtimes.targets
@@ -295,7 +295,7 @@
         WorkingDirectory="$(IntermediateOutputPath)\%(_MonoRuntime.Identity)"
     />
     <Touch
-        Files="@(_RuntimeSource);@(_ProfilerSource);@(_MonoPosixHelperSource);@(_BclProfileItems)"
+        Files="@(_RuntimeSource);@(_ProfilerSource);@(_MonoPosixHelperSource);@(_BclProfileItems);@(_MonoBtlsSource)"
     />
   </Target>
   <Target Name="_InstallRuntimes"
@@ -459,6 +459,9 @@
         SourceFiles="@(_FSharp)"
         DestinationFolder="$(_BclFrameworkDir)"
     />
+    <Touch
+        Files="@(_FSharp->'$(_BclFrameworkDir)\%(Filename)%(Extension)')"
+    />
     <Touch
         Files="@(_BclInstalledItem)"
     />
diff --git a/src/Mono.Android/Mono.Android.csproj b/src/Mono.Android/Mono.Android.csproj
index 044d062871c..11c32affcf7 100644
--- a/src/Mono.Android/Mono.Android.csproj
+++ b/src/Mono.Android/Mono.Android.csproj
@@ -315,7 +315,7 @@
   </PropertyGroup>
   <Import Project="Mono.Android.targets" />
   <PropertyGroup>
-    <JavaCallableWrapperAbsAssembly>$(JavaCallableWrapperOutputPathAbs)$(AssemblyName).dll</JavaCallableWrapperAbsAssembly>
+    <JavaCallableWrapperAbsAssembly>$([System.IO.Path]::GetFullPath ('$(OutputPath)$(AssemblyName).dll'))</JavaCallableWrapperAbsAssembly>
     <JavaCallableWrapperAfterTargets>CoreBuild</JavaCallableWrapperAfterTargets>
   </PropertyGroup>
   <Import Project="..\..\build-tools\scripts\JavaCallableWrappers.targets" />
diff --git a/src/Mono.Android/Mono.Android.targets b/src/Mono.Android/Mono.Android.targets
index 61e9d947461..a4d5ed660bb 100644
--- a/src/Mono.Android/Mono.Android.targets
+++ b/src/Mono.Android/Mono.Android.targets
@@ -40,6 +40,7 @@
     <Exec
         Command="$(ManagedRuntime) ..\..\bin\Build$(Configuration)\jnienv-gen.exe -o Android.Runtime\JNIEnv.g.cs --use-java-interop"
     />
+    <Touch Files="Android.Runtime\JNIEnv.g.cs" />
   </Target>
   <ItemGroup>
     <_AndroidProfile Include="Profiles\api-*.xml.in" />
@@ -128,6 +129,7 @@
         SourceFiles="$(IntermediateOutputPath)__dex\classes.dex"
         DestinationFiles="$(OutputPath)mono.android.dex"
     />
+    <Touch Files="$(OutputPath)mono.android.dex" />
     <RemoveDir
         Directories="$(IntermediateOutputPath)__dex"
     />
diff --git a/src/Xamarin.Android.Build.Tasks/Xamarin.Android.Build.Tasks.targets b/src/Xamarin.Android.Build.Tasks/Xamarin.Android.Build.Tasks.targets
index 58b558d8c66..22b3dcecf6c 100644
--- a/src/Xamarin.Android.Build.Tasks/Xamarin.Android.Build.Tasks.targets
+++ b/src/Xamarin.Android.Build.Tasks/Xamarin.Android.Build.Tasks.targets
@@ -143,9 +143,11 @@
     <Copy
       SourceFiles="$(IntermediateOutputPath)multidex-aar\classes.jar"
       DestinationFiles="$(OutputPath)..\..\..\mandroid\android-support-multidex.jar" />
+    <Touch Files="$(OutputPath)..\..\..\mandroid\android-support-multidex.jar" />
     <Copy
       SourceFiles="$(_SupportLicense)"
       DestinationFiles="$(OutputPath)..\..\..\mandroid\MULTIDEX_JAR_LICENSE" />
+    <Touch Files="$(OutputPath)..\..\..\mandroid\MULTIDEX_JAR_LICENSE" />
   </Target>
 
   <ItemGroup>
diff --git a/src/Xamarin.Android.Tools.BootstrapTasks/Xamarin.Android.Tools.BootstrapTasks/GenerateProfile.cs b/src/Xamarin.Android.Tools.BootstrapTasks/Xamarin.Android.Tools.BootstrapTasks/GenerateProfile.cs
index c7c9fdda82a..d5c4b31693b 100644
--- a/src/Xamarin.Android.Tools.BootstrapTasks/Xamarin.Android.Tools.BootstrapTasks/GenerateProfile.cs
+++ b/src/Xamarin.Android.Tools.BootstrapTasks/Xamarin.Android.Tools.BootstrapTasks/GenerateProfile.cs
@@ -38,7 +38,14 @@ public override bool Execute ()
 			sb.AppendLine ("\t}");
 			sb.AppendLine ("}");
 
-			File.WriteAllText (OutputFile.ItemSpec, sb.ToString ());
+			var newContents = sb.ToString ();
+			var curContents = "";
+			if (File.Exists (OutputFile.ItemSpec)) {
+				curContents = File.ReadAllText (OutputFile.ItemSpec);
+			}
+			if (newContents != curContents) {
+				File.WriteAllText (OutputFile.ItemSpec, sb.ToString ());
+			}
 
 			return !Log.HasLoggedErrors;
 		}