* Pass nixUnstable to the tarball build.

Dependencies

• [2] U2BNO3C5 hydra: fix build job
• [3] T4LLYESZ * Nix expression for building Hydra.
• [4] FV2M6MOT hydra: use autoconf/-make
• [5] SAFVRDTK * Put Hydra's dependencies so that they can easily be installed in a
• [6] YQWH4POV * Simplify.
• [7] HPIJ35SG

Change contents

• replacement in release.nix at line 9
  [2.13]→[3.17533:17585](∅→∅),[3.17533]→[3.17533:17585](∅→∅)
  − let pkgs = import nixpkgs {};

  − in with pkgs;
  [2.13]

  [3.23]
  + with import nixpkgs { };

  +

  + let nix = nixUnstable; in
• replacement in release.nix at line 50
  [3.875]→[3.1663:1691](∅→∅)
  − let nix = nixSqlite; in
  [3.875]

  [3.184]
  + let nix = nixUnstable; in