diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 0000000..80e5f12
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,12 @@
+# Ignore non-functional treewide changes by configuring
+#
+#   $ git config blame.ignoreRevsFile .git-blame-ignore-revs
+#
+# or used temporarily with --ignore-revs-file=
+#
+
+# nixfmt
+1a7f3d718c5a6406b7d5b54f10f5c9c69ed90ef9
+
+# language hints
+06cc71c76eb52dc747704a317ac5e175ebdd2ba8