diff --git a/plasma-workspace.spec b/plasma-workspace.spec
index 96dcd39..80c680b 100644
--- a/plasma-workspace.spec
+++ b/plasma-workspace.spec
@@ -1,3 +1,5 @@
+%undefine __cmake_in_source_build
+
 # Set (as 1) to enable bootstrap when building plasma-workspace on a new
 # repo or arch where there's no package that would provide plasmashell
 #global bootstrap 1
@@ -390,16 +392,12 @@ EOL
 
 
 %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
 
 chrpath --delete %{buildroot}%{_kf5_qtplugindir}/phonon_platform/kde.so