From 56b6ede1250690835c0795a2262ade90214326ba Mon Sep 17 00:00:00 2001
From: Vit Zikmund <vit.zikmund@themama.ai>
Date: Thu, 7 Dec 2023 18:12:09 +0100
Subject: [PATCH] chore: debug output for build env preparation

---
 src/poetry/utils/env/__init__.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/poetry/utils/env/__init__.py b/src/poetry/utils/env/__init__.py
index ed22bb3797b..4cb3e56df17 100644
--- a/src/poetry/utils/env/__init__.py
+++ b/src/poetry/utils/env/__init__.py
@@ -82,10 +82,10 @@ def build_environment(
 
                 io.overwrite_error(
                     "<b>Preparing</b> build environment with build-system requirements"
-                    f" {', '.join(requires)}"
+                    f" {', '.join(requires)}\n"
                 )
 
-            venv.run_pip(
+            output = venv.run_pip(
                 "install",
                 "--disable-pip-version-check",
                 "--ignore-installed",
@@ -93,7 +93,10 @@ def build_environment(
                 *poetry.pyproject.build_system.requires,
             )
 
-            if overwrite:
+            if io and io.is_debug() and output:
+                io.write_error(output)
+
+            if not overwrite:
                 assert io is not None
                 io.write_error_line("")