-%if "%{_alt_kernel}" != "%{nil}"
-%undefine with_userspace
-%if 0%{?build_kernels:1}
-%{error:alt_kernel and build_kernels are mutually exclusive}
-exit 1
-%endif
-%undefine with_userspace
-%global _build_kernels %{alt_kernel}
-%else
-%global _build_kernels %{?build_kernels:,%{?build_kernels}}
-%endif
-