diff --git a/import-layers/yocto-poky/bitbake/bin/bitbake-worker b/import-layers/yocto-poky/bitbake/bin/bitbake-worker
index db3c4b1..ee2d622 100755
--- a/import-layers/yocto-poky/bitbake/bin/bitbake-worker
+++ b/import-layers/yocto-poky/bitbake/bin/bitbake-worker
@@ -95,6 +95,7 @@
             pass
         while (worker_queue_int or not worker_queue.empty()):
             try:
+                (_, ready, _) = select.select([], [worker_pipe], [], 1)
                 if not worker_queue.empty():
                     worker_queue_int = worker_queue_int + worker_queue.get()
                 written = os.write(worker_pipe, worker_queue_int)
@@ -135,7 +136,7 @@
     os.killpg(0, signal.SIGTERM)
     sys.exit()
 
-def fork_off_task(cfg, data, databuilder, workerdata, fn, task, taskname, appends, taskdepdata, quieterrors=False):
+def fork_off_task(cfg, data, databuilder, workerdata, fn, task, taskname, appends, taskdepdata, extraconfigdata, quieterrors=False, dry_run_exec=False):
     # We need to setup the environment BEFORE the fork, since
     # a fork() or exec*() activates PSEUDO...
 
@@ -151,8 +152,10 @@
         except TypeError:
              umask = taskdep['umask'][taskname]
 
+    dry_run = cfg.dry_run or dry_run_exec
+
     # We can't use the fakeroot environment in a dry run as it possibly hasn't been built
-    if 'fakeroot' in taskdep and taskname in taskdep['fakeroot'] and not cfg.dry_run:
+    if 'fakeroot' in taskdep and taskname in taskdep['fakeroot'] and not dry_run:
         envvars = (workerdata["fakerootenv"][fn] or "").split()
         for key, value in (var.split('=') for var in envvars):
             envbackup[key] = os.environ.get(key)
@@ -219,16 +222,21 @@
                 the_data = databuilder.mcdata[mc]
                 the_data.setVar("BB_WORKERCONTEXT", "1")
                 the_data.setVar("BB_TASKDEPDATA", taskdepdata)
+                if cfg.limited_deps:
+                    the_data.setVar("BB_LIMITEDDEPS", "1")
                 the_data.setVar("BUILDNAME", workerdata["buildname"])
                 the_data.setVar("DATE", workerdata["date"])
                 the_data.setVar("TIME", workerdata["time"])
+                for varname, value in extraconfigdata.items():
+                    the_data.setVar(varname, value)
+
                 bb.parse.siggen.set_taskdata(workerdata["sigdata"])
                 ret = 0
 
                 the_data = bb_cache.loadDataFull(fn, appends)
                 the_data.setVar('BB_TASKHASH', workerdata["runq_hash"][task])
 
-                bb.utils.set_process_name("%s:%s" % (the_data.getVar("PN", True), taskname.replace("do_", "")))
+                bb.utils.set_process_name("%s:%s" % (the_data.getVar("PN"), taskname.replace("do_", "")))
 
                 # exported_vars() returns a generator which *cannot* be passed to os.environ.update() 
                 # successfully. We also need to unset anything from the environment which shouldn't be there 
@@ -243,11 +251,11 @@
                     the_data.setVar(e, fakeenv[e])
                     the_data.setVarFlag(e, 'export', "1")
 
-                task_exports = the_data.getVarFlag(taskname, 'exports', True)
+                task_exports = the_data.getVarFlag(taskname, 'exports')
                 if task_exports:
                     for e in task_exports.split():
                         the_data.setVarFlag(e, 'export', '1')
-                        v = the_data.getVar(e, True)
+                        v = the_data.getVar(e)
                         if v is not None:
                             os.environ[e] = v
 
@@ -259,7 +267,7 @@
                     logger.critical(traceback.format_exc())
                 os._exit(1)
             try:
-                if cfg.dry_run:
+                if dry_run:
                     return 0
                 return bb.build.exec_task(fn, taskname, the_data, cfg.profile)
             except:
@@ -328,6 +336,7 @@
         self.cookercfg = None
         self.databuilder = None
         self.data = None
+        self.extraconfigdata = None
         self.build_pids = {}
         self.build_pipes = {}
     
@@ -362,6 +371,7 @@
                     pass
             if len(self.queue):
                 self.handle_item(b"cookerconfig", self.handle_cookercfg)
+                self.handle_item(b"extraconfigdata", self.handle_extraconfigdata)
                 self.handle_item(b"workerdata", self.handle_workerdata)
                 self.handle_item(b"runtask", self.handle_runtask)
                 self.handle_item(b"finishnow", self.handle_finishnow)
@@ -369,9 +379,11 @@
                 self.handle_item(b"quit", self.handle_quit)
 
             for pipe in self.build_pipes:
-                self.build_pipes[pipe].read()
+                if self.build_pipes[pipe].input in ready:
+                    self.build_pipes[pipe].read()
             if len(self.build_pids):
-                self.process_waitpid()
+                while self.process_waitpid():
+                    continue
 
 
     def handle_item(self, item, func):
@@ -388,6 +400,9 @@
         self.databuilder.parseBaseConfiguration()
         self.data = self.databuilder.data
 
+    def handle_extraconfigdata(self, data):
+        self.extraconfigdata = pickle.loads(data)
+
     def handle_workerdata(self, data):
         self.workerdata = pickle.loads(data)
         bb.msg.loggerDefaultDebugLevel = self.workerdata["logdefaultdebug"]
@@ -410,10 +425,10 @@
         sys.exit(0)
 
     def handle_runtask(self, data):
-        fn, task, taskname, quieterrors, appends, taskdepdata = pickle.loads(data)
+        fn, task, taskname, quieterrors, appends, taskdepdata, dry_run_exec = pickle.loads(data)
         workerlog_write("Handling runtask %s %s %s\n" % (task, fn, taskname))
 
-        pid, pipein, pipeout = fork_off_task(self.cookercfg, self.data, self.databuilder, self.workerdata, fn, task, taskname, appends, taskdepdata, quieterrors)
+        pid, pipein, pipeout = fork_off_task(self.cookercfg, self.data, self.databuilder, self.workerdata, fn, task, taskname, appends, taskdepdata, self.extraconfigdata, quieterrors, dry_run_exec)
 
         self.build_pids[pid] = task
         self.build_pipes[pid] = runQueueWorkerPipe(pipein, pipeout)
@@ -426,9 +441,9 @@
         try:
             pid, status = os.waitpid(-1, os.WNOHANG)
             if pid == 0 or os.WIFSTOPPED(status):
-                return None
+                return False
         except OSError:
-            return None
+            return False
 
         workerlog_write("Exit code of %s for pid %s\n" % (status, pid))
 
@@ -447,6 +462,8 @@
 
         worker_fire_prepickled(b"<exitcode>" + pickle.dumps((task, status)) + b"</exitcode>")
 
+        return True
+
     def handle_finishnow(self, _):
         if self.build_pids:
             logger.info("Sending SIGTERM to remaining %s tasks", len(self.build_pids))