diff --git a/.nxignore b/.nxignore
new file mode 100644
index 0000000000..5758b6a456
--- /dev/null
+++ b/.nxignore
@@ -0,0 +1,3 @@
+# Having fixtures with a package.json and project.json leads to a duplicate package resolution issue.
+# see https://github.com/nrwl/nx/issues/20959
+@commitlint/*/fixtures/**