This reverts commit 62ab77a322.
This broke nixosTests.borgbackup:
https://github.com/NixOS/nixpkgs/pull/143995#issuecomment-985136152
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at https://nixos.org/nixos and in the manual in doc/manual.