flake.lock: Update

Flake input changes:

  • Updated 'nix': 'github:NixOS/nix/edfd676e059578fb574ce78d1a2cc66d018d3b16' -> 'github:NixOS/nix/eb75282b8dc855983368c79cc4c2943c298518f7'

Created by  Eelco Dolstra  on August 27, 2020
UA2PMN7M7YFS56IO4DVRN55R5ZGN244A65ZAD2K6KSJU5BP56BIAC
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