For nix-shell, set some more variables in preHook

Dependencies

• [2] QK2OXCKP hydra/release.nix: move manual to tarball build, restore version in store path for tarball build
• [*] T4LLYESZ * Nix expression for building Hydra.
• [*] UHMUHQMU hydra: fix tarball build, add pre suffix to tarballs

Change contents

• edit in release.nix at line 30
  [5.188]

  [2.115]
  +

  + addToSearchPath PATH $(pwd)/src/script

  + addToSearchPath PATH $(pwd)/src/c

  + addToSearchPath PERL5LIB $(pwd)/src/lib