diff --git a/CuraEngine.spec b/CuraEngine.spec
index 8682f65..889a872 100644
--- a/CuraEngine.spec
+++ b/CuraEngine.spec
@@ -25,6 +25,9 @@ BuildRequires:  git-core
 Patch0:         %{name}-rpath.patch
 Patch1:         %{name}-static-libstdcpp.patch
 
+# Get Fedora 33++ behavior on anything older
+%undefine __cmake_in_source_build
+
 %description
 %{name} is a C++ console application for 3D printing G-code generation. It
 has been made as a better and faster alternative to the old Skeinforge engine.
@@ -44,12 +47,12 @@ rm -rf libs
 sed -i 's/"DEV"/"%{version}"/' src/settings/Settings.h
 
 %build
-%{cmake} -DBUILD_SHARED_LIBS:BOOL=OFF  -DCURA_ENGINE_VERSION:STRING=%{version} -DUSE_SYSTEM_LIBS:BOOL=ON -DCMAKE_CXX_FLAGS_RELEASE_INIT:STRING="%{optflags} -fPIC" -DStb_INCLUDE_DIRS:PATH=./stb-%{stb_commit} .
-make %{?_smp_mflags}
+%cmake -DBUILD_SHARED_LIBS:BOOL=OFF -DCURA_ENGINE_VERSION:STRING=%{version} -DUSE_SYSTEM_LIBS:BOOL=ON -DCMAKE_CXX_FLAGS_RELEASE_INIT:STRING="%{optflags} -fPIC" -DStb_INCLUDE_DIRS:PATH=${PWD}
+%cmake_build
 
 
 %install
-make install DESTDIR=%{buildroot}
+%cmake_install
 
 
 %check