diff --git a/README.md b/README.md
index 50371b1..9621855 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,12 @@ yarn build
 next export -o ../server/app
 ```
 
+Build might fail if `next-font-manifest.json` is missing.
+
+```bash
+touch .next/server/next-font-manifest.json
+```
+
 ### Distribute for Anki
 
 ```bash