This incorporates the following two commits from <nixpkgs>:
NixOS/nixpkgs@f83af95f8a54d0375ac6e159b663de887ba5b6a6 NixOS/nixpkgs@5e7a1cf955e43e1fa3c1c157c0d6961e1bcf9801
Hydra was the original reason why I was fixing tempdir creation in the first place. Seeing that Hydra ships its own versions of these scripts, we need to patch them here as well.
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
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