diff --git a/breeze6/breeze6.spec b/breeze6/breeze6.spec
index 46dc106..18e2109 100644
--- a/breeze6/breeze6.spec
+++ b/breeze6/breeze6.spec
@@ -22,6 +22,7 @@ VCS:            git:https://invent.kde.org/plasma/breeze
 #!RemoteAsset:  sha256:09b3f7bd2386c4b91c418462f02b203510f2ae88489398ef05e0b6ddea3aa590
 Source:         https://download.kde.org/stable/plasma/%{version}/%{name}-%{version}.tar.xz
 
+BuildSystem:    cmake
 BuildOption(build): -DBUILD_QT6:BOOL=TRUE
 BuildOption(build): -DBUILD_QT5:BOOL=FALSE