diff --git a/build/scripts/build_windows.py b/build/scripts/build_windows.py
index eaaea26..b60d257 100644
--- a/build/scripts/build_windows.py
+++ b/build/scripts/build_windows.py
@@ -348,7 +348,7 @@ class WindowsBuilder:
             print(f"  ✓ Marked components as 64-bit")
 
         # Compile both WiX files
-        wix_obj = self.build_dir / "WebDropBridge.wixobj"
+        wix_obj = self.build_dir / "WebDropBridge.generated.wixobj"
         wix_files_obj = self.build_dir / "WebDropBridge_Files.wixobj"
         msi_output = self.dist_dir / self.brand.windows_installer_name(self.version)
 
@@ -360,7 +360,7 @@ class WindowsBuilder:
             "-ext",
             "WixUtilExtension",
             f"-dDistDir={self.dist_dir}",
-            f"-dSourceDir={self.dist_dir}\{self.brand.exe_name}",  # Set SourceDir for Heat-generated files
+            f"-dSourceDir={self.dist_dir / self.brand.exe_name}",  # Set SourceDir for Heat-generated files
             f"-dResourcesDir={self.project_root}\\resources",  # Set ResourcesDir for branding assets
             "-o",
             str(self.build_dir) + "\\",