Also own %{_libdir}/%{name}/lib/cmake/

mpich.spec

@@ -1,7 +1,7 @@
 Summary:        A high-performance implementation of MPI
 Name:           mpich
 Version:        3.4.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 License:        MIT
 URL:            https://www.mpich.org/
 
@@ -236,6 +236,7 @@ make check VERBOSE=1 \
 
 %files devel
 %{_includedir}/%{name}-%{_arch}/
+%{_libdir}/%{name}/lib/cmake/
 %{_libdir}/%{name}/lib/pkgconfig/
 %{_libdir}/%{name}/lib/*.so
 %{_libdir}/%{name}/bin/mpicc
@@ -257,6 +258,9 @@ make check VERBOSE=1 \
 %{python3_sitearch}/%{name}.pth
 
 %changelog
+* Fri Sep 03 2021 Sandro Mani <manisandro@gmail.com> - 3.4.1-4
+- Also own %%{_libdir}/%%{name}/lib/cmake/
+
 * Thu Jul 22 2021 Fedora Release Engineering <releng@fedoraproject.org> - 3.4.1-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild