diff --git a/knavalbattle.spec b/knavalbattle.spec
index 5d100fa..a04ddb4 100644
--- a/knavalbattle.spec
+++ b/knavalbattle.spec
@@ -1,3 +1,4 @@
+%undefine __cmake_in_source_build
 
 Name:    knavalbattle
 Summary: A ship sinking game
@@ -52,16 +53,12 @@ ships wins the game.
 
 
 %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
 
 %find_lang %{name} --all-name --with-html