https://fedoraproject.org/wiki/Changes/CMake_to_do_out-of-source_builds

cura.spec

@@ -48,6 +48,9 @@ Requires:       libglvnd-devel
 # So that it just works
 Requires:       3dprinter-udev-rules
 
+# Get Fedora 33++ behavior on anything older
+%undefine __cmake_in_source_build
+
 %description
 Cura is a project which aims to be an single software solution for 3D printing.
 While it is developed to be used with the Ultimaker 3D printer, it can be used
@@ -72,14 +75,14 @@ dos2unix docs/How_to_use_the_flame_graph_profiler.md
 sed -i '1s=^#!/usr/bin/\(python\|env python\)3*=#!%{__python3}=' cura_app.py
 
 %build
-%{cmake} \
+%cmake \
   -DCURA_VERSION:STRING=%{version} \
   -DCURA_BUILDTYPE=RPM \
   -DCURA_CLOUD_API_ROOT:STRING=%{cura_cloud_api_root} \
   -DCURA_CLOUD_API_VERSION:STRING=%{cura_cloud_api_version} \
   -DCURA_CLOUD_ACCOUNT_API_ROOT:STRING=%{cura_cloud_account_api_root} \
-  -DLIB_SUFFIX:STR= .
-make %{?_smp_mflags}
+  -DLIB_SUFFIX:STR=
+%cmake_build
 
 # rebuild locales
 cd resources/i18n
@@ -95,7 +98,7 @@ cd -
 
 
 %install
-make install DESTDIR=%{buildroot}
+%cmake_install
 
 # Sanitize the location of locale files
 pushd %{buildroot}%{_datadir}