From efe7523c40f1cc0321900e9f410e0dfaf17fa914 Mon Sep 17 00:00:00 2001
From: Matthias Koeppe <mkoeppe@math.ucdavis.edu>
Date: Thu, 11 Jun 2020 18:41:09 -0700
Subject: [PATCH] build/bin/sage-pip-install: For PEP 517 packages, do not try
 to uninstall first

---
 build/bin/sage-pip-uninstall | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/build/bin/sage-pip-uninstall b/build/bin/sage-pip-uninstall
index 8f7a1031998..cf737d0b6bf 100755
--- a/build/bin/sage-pip-uninstall
+++ b/build/bin/sage-pip-uninstall
@@ -21,6 +21,11 @@ PYTHON=python3
 # The PIP variable is only used to determine the name of the lock file.
 PIP=pip3
 
+# For PEP 517 packages, do not try to uninstall
+if [ ! -f setup.py ]; then
+    exit 0
+fi
+
 # Find out the name of the package that we are installing
 name="$($PYTHON setup.py --name)"