Fix build

Dependencies

• [2] SHAPFDTU Bump Nix version
• [3] VQISTKOP hydra-queue-runner: Use substitutes
• [4] 5AIYUMTB Basic remote building
• [5] IKJBYIGY Update to reflect BinaryCacheStore changes
• [6] BYVRA54Q Temporarily disable machines on any exception, not just connection failures
• [*] MHVIT4JY Split hydra-queue-runner.cc more

Change contents

• replacement in src/hydra-queue-runner/build-remote.cc at line 270
  [2.512]→[2.512:616](∅→∅)
  − copyPaths(ref<Store>(localStore), destStore, closure, NoRepair, NoCheckSigs, NoSubstitute);
  [2.512]

  [2.616]
  + copyPaths(*localStore, *destStore, closure, NoRepair, NoCheckSigs, NoSubstitute);
• replacement in src/hydra-queue-runner/queue-monitor.cc at line 514
  [2.737]→[2.737:847](∅→∅)
  − copyPaths(ref<Store>(localStore), destStore, closure, NoRepair, CheckSigs, NoSubstitute);
  [2.737]

  [3.2442]
  + copyPaths(*localStore, *destStore, closure, NoRepair, CheckSigs, NoSubstitute);