Dependencies

• [2] UHMUHQMU hydra: fix tarball build, add pre suffix to tarballs
• [3] T4LLYESZ * Nix expression for building Hydra.
• [4] VM3TQZ65 * hydra: make manual.pdf
• [5] U2BNO3C5 hydra: fix build job
• [6] YQWH4POV * Simplify.

Change contents

• replacement in release.nix at line 40
  [3.1780]→[2.199:261](∅→∅)
  − [ perl makeWrapper libtool nix unzip nukeReferences ]
  [3.1780]

  [3.1817]
  + [ perl makeWrapper libtool nix unzip nukeReferences boehmgc ]