Fix arpack solver #492

Job	Run time
ubuntu_latest_cmake_install	11m 48s
ubuntu_latest_cmake	4m 40s
macos_latest_cmake	6m 39s
macos_latest_cmake_python	6m 43s
ubuntu_latest_autotools	5m 52s
ubuntu_latest_autotools_ilp64	1m 29s
ubuntu_latest_autotools_install	18m 18s
ubuntu_latest_cmake_python	14m 1s
macos_latest_autotools	4m 7s
MinGW-w64 UCRT64 INTERFACE64=ON/MPI=OFF	9m 46s
MinGW-w64 UCRT64 INTERFACE64=OFF/MPI=ON	10m 10s
MinGW-w64 UCRT64 INTERFACE64=OFF/MPI=OFF	10m 6s
MinGW-w64 CLANG64 INTERFACE64=ON/MPI=OFF	7m 47s
MinGW-w64 CLANG64 INTERFACE64=OFF/MPI=ON	8m 12s
MinGW-w64 CLANG64 INTERFACE64=OFF/MPI=OFF	8m 33s
	2h 8m 11s

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