diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0b6a7acb..e1bf81c7 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -906,8 +906,7 @@ packages:
         - generics-sop
 
     "Vivian McPhail <haskell.vivian.mcphail@gmail.com>":
-        # https://github.com/amcphail/hmatrix-gsl-stats/issues/6
-        # - hmatrix-gsl-stats
+        - hmatrix-gsl-stats
         - hstatistics
         - hsignal
         - plot
@@ -1074,6 +1073,9 @@ packages:
         # https://github.com/fpco/stackage/issues/602
         - errors < 2
 
+        # https://github.com/amcphail/hmatrix-gsl-stats/issues/6
+        - hmatrix-gsl-stats < 0.3
+
 # Package flags are applied to individual packages, and override the values of
 # global-flags
 package-flags: