* Add indirect root registration to the protocol so that unprivileged

processes can register indirect roots.  Of course, there is still
  the problem that the garbage collector can only read the targets of
  the indirect roots when it's running as root...

src/libstore/worker-protocol.hh

@@ -19,7 +19,8 @@ typedef enum {
     wopBuildDerivations,
     wopEnsurePath,
     wopAddTempRoot,
-    wopSyncWithGC
+    wopAddIndirectRoot,
+    wopSyncWithGC,
 } WorkerOp;