diff --git a/build-constraints.yaml b/build-constraints.yaml
index 897ca989..d021ca68 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1052,6 +1052,9 @@ expected-test-failures:
     # https://github.com/d12frosted/CanonicalPath/issues/4
     - system-canonicalpath
 
+    # https://github.com/myfreeweb/gitson/issues/1
+    - gitson
+
 # Haddocks which are expected to fail. Same concept as expected test failures.
 expected-haddock-failures:
     # https://github.com/acw/bytestring-progress/issues/4