preHook -> shellHook

Dependencies

• [2] ICYJNJWH Revert "Move build logic for the core hydra package into its own default.nix."
• [3] IZYR3KTL release.nix: Get rid of the "system" argument
• [4] HPIJ35SG
• [*] T4LLYESZ * Nix expression for building Hydra.

Change contents

• replacement in release.nix at line 149
  [2.3199]→[2.3199:3218](∅→∅)
  − preHook = ''
  [2.3199]

  [2.3218]
  + shellHook = ''