diff --git a/IDE/src/Compiler/BfCompiler.bf b/IDE/src/Compiler/BfCompiler.bf
index 74f2a02c..d2f5af96 100644
--- a/IDE/src/Compiler/BfCompiler.bf
+++ b/IDE/src/Compiler/BfCompiler.bf
@@ -150,6 +150,11 @@ namespace IDE.Compiler
             public BfPassInstance mPassInstance;
         }
 
+		class DeletePassInstanceCommand : Command
+		{
+		    public BfPassInstance mPassInstance;
+		}
+
         class SetupProjectSettingsCommand : Command
         {
             public Project mProject;
@@ -265,6 +270,13 @@ namespace IDE.Compiler
             QueueCommand(command);
         }
 
+		public void QueueDeletePassInstance(BfPassInstance passInstance)
+		{
+		    DeletePassInstanceCommand command = new DeletePassInstanceCommand();
+		    command.mPassInstance = passInstance;            
+		    QueueCommand(command);
+		}
+
         public void QueueSetupProjectSettings(Project project)
         {
             SetupProjectSettingsCommand command = new SetupProjectSettingsCommand();
@@ -338,6 +350,13 @@ namespace IDE.Compiler
                 {
                     var setPassInstanceCommand = (SetPassInstanceCommand)command;
                     passInstance = setPassInstanceCommand.mPassInstance;
+                }
+				else if (command is DeletePassInstanceCommand)
+                {
+                    var deletePassInstanceCommand = (DeletePassInstanceCommand)command;
+					if (passInstance == deletePassInstanceCommand.mPassInstance)
+						passInstance = null;
+                    delete deletePassInstanceCommand.mPassInstance;
                 }
                 else if (passInstance == null)
                 {
diff --git a/IDE/src/IDEApp.bf b/IDE/src/IDEApp.bf
index 214d58e7..43347e00 100644
--- a/IDE/src/IDEApp.bf
+++ b/IDE/src/IDEApp.bf
@@ -8272,7 +8272,12 @@ namespace IDE
 
 			if (bfSystem != mBfResolveSystem)
 			{
-				if (options.mBuildOptions.mBuildKind == .Test)
+				if (options.mBuildOptions.mBuildKind == .NotSupported)
+				{
+					OutputErrorLine("Project '{0}' is marked as 'not supported' for this platform/configuration", project.mProjectName);
+					success = false;
+				}
+				else if (options.mBuildOptions.mBuildKind == .Test)
 				{
 					if (workspaceOptions.mBuildKind == .Test)
 					{
@@ -8575,7 +8580,10 @@ namespace IDE
 			}
 
             if (!success)
+			{
+				bfCompiler.QueueDeletePassInstance(passInstance);
                 return null;
+			}
 
             for (var project in mWorkspace.mProjects)
             {
@@ -9824,8 +9832,18 @@ namespace IDE
 				canCompile = false;
 			}
 
-			//TODO:
 			canCompile = true;
+			switch (platform)
+			{
+			case .iOS:
+				canCompile = hostPlatform == .macOS;
+			case .Android:
+				canCompile = true;
+			case .Unknown:
+				canCompile = true;
+			default:
+				canCompile = platform == hostPlatform;
+			}
 			
 			if (!canCompile)
 			{
diff --git a/IDE/src/Project.bf b/IDE/src/Project.bf
index 5125e3b3..ba53025c 100644
--- a/IDE/src/Project.bf
+++ b/IDE/src/Project.bf
@@ -818,6 +818,7 @@ namespace IDE
 			case Test;
 			case StaticLib;
 			case DynamicLib;
+			case NotSupported;
 
 			public bool IsApplicationLib
 			{