From c9640899f5215980c511f0dea157e08c924d075d Mon Sep 17 00:00:00 2001
From: Sergey Vinokurov <serg.foo@gmail.com>
Date: Wed, 3 Jul 2019 18:02:42 +0100
Subject: [PATCH] Add sexp-grammar and invertible-grammar back

---
 build-constraints.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 07cdef3c..c65236c1 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3714,8 +3714,8 @@ packages:
         - tasty-ant-xml
 
     "Eugene Smolanka <esmolanka@gmail.com> @esmolanka":
-        - sexp-grammar < 0
-        - invertible-grammar < 0
+        - sexp-grammar
+        - invertible-grammar
 
     "Maximilian Tagher <feedback.tagher@gmail.com> @MaxGabriel":
         - aeson-iproute