diff --git a/src/catala/surface/dune b/src/catala/surface/dune
index 34b2698a..5fe17aee 100644
--- a/src/catala/surface/dune
+++ b/src/catala/surface/dune
@@ -16,6 +16,11 @@
 
 ;; No built-in support for Menhir's parser messages yet
 
+(rule
+ (with-stdout-to
+  parser.messages.new
+  (run menhir %{dep:parser.mly} --list-errors)))
+
 (rule
  (with-stdout-to
   parser_errors.ml
@@ -30,3 +35,8 @@
  (alias update-parser-messages)
  (action
   (diff parser.messages parser.messages.updated)))
+
+(rule
+ (alias create-parser-messages)
+ (action
+  (diff parser.messages parser.messages.new)))