diff --git a/kf5-akonadi-server.spec b/kf5-akonadi-server.spec
index 2827f1d..c631c56 100644
--- a/kf5-akonadi-server.spec
+++ b/kf5-akonadi-server.spec
@@ -1,3 +1,4 @@
+%undefine __cmake_in_source_build
 %global framework akonadi-server
 
 # trim changelog included in binary rpms
@@ -159,19 +160,16 @@ See also: %{_sysconfdir}/akonadi/mysql-global.conf
 
 
 %build
-mkdir %{_target_platform}
-pushd %{_target_platform}
-%{cmake_kf5} .. \
+%{cmake_kf5} \
   %{?database_backend:-DDATABASE_BACKEND=%{database_backend}} \
   -DBUILD_TESTING:BOOL=%{?tests:ON}%{!?tests:OFF} \
   -DINSTALL_APPARMOR:BOOL=OFF
-popd
 
-%make_build -C %{_target_platform}
+%cmake_build
 
 
 %install
-make install/fast DESTDIR=$RPM_BUILD_ROOT -C %{_target_platform}
+%cmake_install
 
 %find_lang libakonadi5
 %find_lang akonadi_knut_resource