diff --git a/.changeset/polite-cherries-exercise.md b/.changeset/polite-cherries-exercise.md
new file mode 100644
index 000000000..9e9db73d5
--- /dev/null
+++ b/.changeset/polite-cherries-exercise.md
@@ -0,0 +1,8 @@
+---
+"graphile-build-pg": patch
+"postgraphile": patch
+"graphile-config": patch
+---
+
+Overhaul the way in which `graphile-config` presets work such that including a
+preset at two different layers shouldn't result in unexpected behavior.