Subject: Prevent removing of the system packages installed under /usr/lib

when pip install -U is executed.

Resolves: rhbz#1550368

python-pip.spec

@@ -22,7 +22,7 @@
 Name:           python-%{srcname}
 # When updating, update the bundled libraries versions bellow!
 Version:        18.0
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        A tool for installing and managing Python packages
 Group:          Development/Libraries
 
@@ -88,6 +88,11 @@ Patch1:         emit-a-warning-when-running-with-root-privileges.patch
 # Add path to the doc themes to conf.py
 Patch2:         html_theme_path.patch
 
+# Prevent removing of the system packages installed under /usr/lib
+# when pip install -U is executed.
+# https://bugzilla.redhat.com/show_bug.cgi?id=1550368#c24
+Patch3:         remove-existing-dist-only-if-path-conflicts.patch
+
 # Downstream only patch
 # Users might have local installations of pip from using
 # `pip install --user --upgrade pip` on older versions.
@@ -250,6 +255,7 @@ popd
 %patch0 -p1
 %patch1 -p1
 %patch2 -p1
+%patch3 -p1
 
 
 %build
@@ -447,6 +453,11 @@ export PYTHONPATH=src
 %endif
 
 %changelog
+* Tue Sep 18 2018 Victor Stinner <vstinner@redhat.com> - 18.0-4
+- Prevent removing of the system packages installed under /usr/lib
+  when pip install -U is executed. Original patch by Michal Cyprian.
+  Resolves: rhbz#1550368.
+
 * Wed Aug 08 2018 Miro Hrončok <mhroncok@redhat.com> - 18.0-3
 - Create python-pip-wheel package with the wheel