crystal_0_32: Fix hydra build on 20.03 #80389
Merged
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Motivation for this change
It seems that there might be hydra machines that run an older version of Nix
where NixOS/nix#2878 is not yet included
(unconfirmed)
In addition crystal 0.32.1 has a bug that only occurs when there is no
tty: crystal-lang/crystal#8609
Combining this lead to a crystal build failing: https://hydra.nixos.org/build/113074265
This fixes that probably rather uncommon occurence by applying the
upstream fix for the bug: crystal-lang/crystal#8609
Ping @peterhoeg @manveru @david50407
Relevant for ZHF #80379
Things done