diff --git a/build-constraints.yaml b/build-constraints.yaml
index 68fd07d5..76fd2774 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -404,7 +404,7 @@ packages:
         - rainbow < 0 # build failure with GHC 8.4 https://github.com/massysett/rainbow/issues/6
         - rainbox < 0 # GHC 8.4 via rainbow
         - multiarg
-        - cartel < 0 # GHC 8.4 BuildFailureException Process exited with ExitFailure 1: ./Setup build
+        - cartel
         - Earley
         - ofx
         - accuerr