Comment (by Roland Haas):

libsz.so (but not eg libsz.so.1) should also be sufficient I think.

To remove PETSc and Silo, yes please remove the respective lines that contain ExternalLibraries/Silo and ExternalLibraries/PETSc (the latter may be commented out using a #DISABLED . I’d remove it anyway because there is some functionality in simfactory that can enable #DISABLED thorns.)

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2837/building-the-einstein-toolkit