Fix remote building

Dependencies

• [2] OCZ4LSGG Automatically retry aborted builds
• [3] 5AIYUMTB Basic remote building

Change contents

• edit in src/hydra-queue-runner/build-remote.cc at line 146
  [2.749]

  [2.749]
  + }

  +

  + /* Gather the inputs. */

  + PathSet inputs({drvPath});

  + for (auto & input : drv.inputDrvs) {

  + Derivation drv2 = readDerivation(input.first);

  + for (auto & name : input.second) {

  + auto i = drv2.outputs.find(name);

  + if (i != drv2.outputs.end()) inputs.insert(i->second.path);

  + }
• replacement in src/hydra-queue-runner/build-remote.cc at line 160
  [2.853]→[3.4008:4064](∅→∅),[3.4008]→[3.4008:4064](∅→∅)
  − copyClosureTo(store, from, to, PathSet({drvPath}));
  [2.853]

  [3.4064]
  + copyClosureTo(store, from, to, inputs);