diff --git a/kf5-kactivities.spec b/kf5-kactivities.spec
index d0953a9..2c63612 100644
--- a/kf5-kactivities.spec
+++ b/kf5-kactivities.spec
@@ -1,3 +1,4 @@
+%undefine __cmake_in_source_build
 %global framework kactivities
 
 Name:           kf5-%{framework}
@@ -56,16 +57,12 @@ Requires:       qt5-qtbase-devel
 
 
 %build
-mkdir %{_target_platform}
-pushd %{_target_platform}
-%{cmake_kf5} ..
-popd
-
-%make_build -C %{_target_platform}
+%{cmake_kf5}
+%cmake_build
 
 
 %install
-make install/fast DESTDIR=%{buildroot} -C %{_target_platform}
+%cmake_install
 
 
 %ldconfig_scriptlets