diff --git a/.gitignore b/.gitignore
index 15863ca..6b421a7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -202,3 +202,5 @@ FakesAssemblies/
 *.opt
 
 .fake
+
+FakeDemo/iOS/iPhoneSimulator/
\ No newline at end of file
diff --git a/FakeDemo/build.fsx b/FakeDemo/build.fsx
index 22989ec..42d5f4a 100644
--- a/FakeDemo/build.fsx
+++ b/FakeDemo/build.fsx
@@ -1,15 +1,48 @@
-#r "packages/FAKE/tools/FakeLib.dll" // 1
-open Fake // 2
+#r "packages/FAKE/tools/FakeLib.dll"
+open Fake
+open Fake.XamarinHelper
 
-Target "Test" (fun _ -> // 3
+let buildDir = "FakeDemo/bin/Debug"
+
+Target "Clean" (fun _ ->
+    CleanDir buildDir
+)
+
+Target "Test" (fun _ ->
     trace "Testing stuff..."
 )
 
-Target "Build" (fun _ ->
-    trace "Heavy build action"
+Target "Build-Pcl" (fun _ ->
+    RestorePackages()
+
+    !! "FakeDemo.csproj"
+        |> MSBuild "FakeDemo/bin/Debug" "Build"  [ ("Configuration", "Debug"); ("Platform", "Any CPU") ] 
+        |> Log "---PCL build output---"
 )
 
-"Build" // 4
-   ==> "Test"
+Target "Build-iOS" (fun _ ->
+    iOSBuild (fun defaults -> 
+        { 
+            defaults with ProjectPath = "iOS/FakeDemo.iOS.csproj"
+                          OutputPath = "iOS/iPhoneSimulator/Debug"
+                          Configuration = "Debug|iPhoneSimulator"
+                          Target = "Build"
+        })
+)
+
+Target "Build-Droid" (fun _ ->
+    !! "Droid/FakeDemo.Droid.csproj"
+        |> MSBuild "Droid/bin/Debug" "Build" [ ("Configuration", "Debug"); ("Platform", "Any CPU") ]
+        |> Log "----Android build output----"
+)
+
+"Clean"
+  ==> "Build-Pcl"
+  ==> "Test"
+
+"Clean"
+  ==> "Build-Pcl"
+  ==> "Build-iOS"
+  ==> "Build-Droid"
 
-Run "Test" // 5
\ No newline at end of file
+RunTargetOrDefault "Test"
\ No newline at end of file