diff --git a/easybuild/framework/easyblock.py b/easybuild/framework/easyblock.py
index 58f4303aa3..d41801c3e9 100644
--- a/easybuild/framework/easyblock.py
+++ b/easybuild/framework/easyblock.py
@@ -1754,11 +1754,8 @@ def update_exts_progress_bar_helper(running_exts, progress_size):
 
             self.update_exts_progress_bar(progress_info, progress_size=progress_size)
 
-        iter_id = 0
         while exts_queue or running_exts:
 
-            iter_id += 1
-
             # always go back to original work dir to avoid running stuff from a dir that no longer exists
             change_dir(self.orig_workdir)
 
diff --git a/easybuild/framework/extension.py b/easybuild/framework/extension.py
index 54ea39f544..5333627c29 100644
--- a/easybuild/framework/extension.py
+++ b/easybuild/framework/extension.py
@@ -225,7 +225,7 @@ def async_cmd_check(self):
     @property
     def required_deps(self):
         """Return list of required dependencies for this extension."""
-        raise NotImplementedError("Don't know how to determine required dependencies for %s" % self.name)
+        raise NotImplementedError("Don't know how to determine required dependencies for extension '%s'" % self.name)
 
     @property
     def toolchain(self):