diff --git a/conanfile.py b/conanfile.py
index 1ac9a49..11eb259 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -98,7 +98,7 @@ def generate(self):
         #tc.variables["Qt6_DIR"] = qt_dir
 
         # for Qt < 6.4.2
-        tc.variables["CMAKE_PREFIX_PATH"] = qt_root
+        tc.variables["Qt6_ROOT"] = qt_root
 
         # Use the ManiVault .cmake file to find ManiVault with find_package
         mv_core_root = self.deps_cpp_info["hdps-core"].rootpath