diff --git a/.gitignore b/.gitignore
index f009e459..e1c5cd7a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,4 +21,4 @@ setup.mk
 *.tlog
 *.obj
 *.pdb
-*.env
+*.env
\ No newline at end of file
diff --git a/Makefile b/Makefile
index b4aa3b73..30fc019c 100644
--- a/Makefile
+++ b/Makefile
@@ -93,6 +93,8 @@ CMAKE_CMD = cmake $(MODMESH_ROOT) \
 	-DLINT_AS_ERRORS=ON \
 	-DMODMESH_PROFILE=$(MODMESH_PROFILE) \
 	-DQT3D_USE_RHI=$(QT3D_USE_RHI) \
+	-Dpybind11_DIR=`pybind11-config --cmakedir` \
+  -DCMAKE_TOOLCHAIN_FILE=${DEVENVPREFIX}/lib/cmake/Qt6/qt.toolchain.cmake \
 	$(CMAKE_ARGS)
 
 $(BUILD_PATH)/Makefile: CMakeLists.txt Makefile
diff --git a/modmesh/pilot/_gui.py b/modmesh/pilot/_gui.py
index 70aa02d5..d08bcd18 100644
--- a/modmesh/pilot/_gui.py
+++ b/modmesh/pilot/_gui.py
@@ -34,12 +34,14 @@
 
 import sys
 import importlib
+from qt_material import apply_stylesheet
 
 from . import _pilot_core as _pcore
 from . import airfoil
 
 if _pcore.enable:
     from PySide6.QtGui import QAction
+    from PySide6.QtWidgets import QApplication
     from . import _mesh
     from . import _euler1d
     from . import _burgers1d
@@ -105,6 +107,10 @@ def launch(self, name="pilot", size=(1000, 600)):
         self.runprofiling = _profiling.RunProfiling(mgr=self._rmgr)
         self.populate_menu()
         self._rmgr.show()
+
+        app = QApplication.instance()
+        apply_stylesheet(app, theme='light_red.xml')
+
         return self._rmgr.exec()
 
     def populate_menu(self):