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Installing ghc on Red Hat Enterprise Linux 7 fails with libtinfo.so.6 dependency

Running ghcup install on RHEL7 fails during "Installing library" step with a dependency on libtinfo.so.6. It seems that on RHEL7 we only have libtinfo.so.5 available.

However, running ghcup install 8.0.2 (the oldest version listed in .available-versions) seems to have worked. It would be good to have some way of finding out the most recent version that will work, and presumably ghcup tries to get these dependencies right?

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