diff --git a/setup.py b/setup.py
index 617f7bb..69e8101 100755
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,9 @@
 
 # Add current folder to path
 # This is required to import versioneer in an isolated pip build
-sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+# Prepending allows not to break on a non-isolated build when versioneer
+# is already installed (c.f. https://github.com/scikit-build/cmake-python-distributions/issues/171)
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 
 import versioneer  # noqa: E402