flake.lock: Update

Flake input changes:

  • Updated 'nix': 'github:NixOS/nix/2e4bd782115c5842781db31f6e06c162f8afe780' -> 'github:NixOS/nix/334e26bfc2ce82912602e8a0f9f9c7e0fb5c3221'

Created by  Eelco Dolstra  on June 23, 2020
ZHKEI6HRT5U3KDXETIVFSNC4KCDBDZFEDVJO7ELKGTVRTF6Z2GXAC
Change contents