diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0bdeb5bf..983881b3 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3845,6 +3845,9 @@ expected-test-failures:
     # https://github.com/fpco/stackage/issues/2689
     - non-negative
 
+    # https://github.com/adamgundry/units-parser/issues/1
+    - units-parser
+
 # end of expected-test-failures
 
 # Benchmarks which are known not to build. Note that, currently we do not run