diff --git a/poetry/installation/executor.py b/poetry/installation/executor.py
index 6e48278b029..78a58595f6e 100644
--- a/poetry/installation/executor.py
+++ b/poetry/installation/executor.py
@@ -280,7 +280,7 @@ def _increment_operations_count(self, operation, executed):
 
     def run_pip(self, *args, **kwargs):  # type: (...) -> int
         try:
-            self._env.run("python", "-m", "pip", *args, **kwargs)
+            self._env.run_pip(*args, **kwargs)
         except EnvCommandError as e:
             output = decode(e.e.output)
             if (