From bef684dc0315f46bfa0abb27e9a9349d266b851f Mon Sep 17 00:00:00 2001
From: frostming <frostming@tencent.com>
Date: Mon, 4 May 2020 20:51:15 +0800
Subject: [PATCH] don't fallback to python unconstrained version

---
 news/4232.bugfix.rst | 1 +
 pipenv/utils.py      | 3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)
 create mode 100644 news/4232.bugfix.rst

diff --git a/news/4232.bugfix.rst b/news/4232.bugfix.rst
new file mode 100644
index 00000000..1138fb9a
--- /dev/null
+++ b/news/4232.bugfix.rst
@@ -0,0 +1 @@
+Don't fallback to system Python when no matching Python version is found.
diff --git a/pipenv/utils.py b/pipenv/utils.py
index eb1f6519..c3cd5d7d 100644
--- a/pipenv/utils.py
+++ b/pipenv/utils.py
@@ -2200,8 +2200,7 @@ def find_python(finder, line=None):
     if not result and not line.startswith("python"):
         line = "python{0}".format(line)
         result = find_python(finder, line)
-    if not result:
-        result = next(iter(finder.find_all_python_versions()), None)
+
     if result:
         if not isinstance(result, six.string_types):
             return result.path.as_posix()