diff --git a/Source/Tools/Flax.Build/Build/Graph/TaskGraph.cs b/Source/Tools/Flax.Build/Build/Graph/TaskGraph.cs
index e3a3a341f..5e092d155 100644
--- a/Source/Tools/Flax.Build/Build/Graph/TaskGraph.cs
+++ b/Source/Tools/Flax.Build/Build/Graph/TaskGraph.cs
@@ -82,7 +82,7 @@ namespace Flax.Build.Graph
             if (Platform.BuildPlatform.Target == TargetPlatform.Windows)
             {
                 task.CommandPath = "xcopy";
-                task.CommandArguments = string.Format("/y \"{0}\" \"{1}\"", srcFile, outputPath);
+                task.CommandArguments = string.Format("/y \"{0}\" \"{1}\"", srcFile.Replace('/', '\\'), outputPath.Replace('/', '\\'));
             }
             else
             {