diff --git a/src/poetry/installation/executor.py b/src/poetry/installation/executor.py
index 9cd4ba52cf8..29d499ecae3 100644
--- a/src/poetry/installation/executor.py
+++ b/src/poetry/installation/executor.py
@@ -226,6 +226,8 @@ def _serialize(
                 wait(tasks)
 
                 for operation in serial_operations:
+                    if self._shutdown:
+                        break
                     self._execute_operation(operation)
 
             except KeyboardInterrupt: