diff --git a/build-constraints.yaml b/build-constraints.yaml
index 98f77345..8a7952a1 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -140,7 +140,7 @@ packages:
         - cutter
         - data-accessor
         - data-accessor-mtl
-        - data-accessor-template < 0 # GHC 8.4 via template-haskell-2.13.0.0
+        - data-accessor-template # 0 # GHC 8.4 via template-haskell-2.13.0.0
         - data-accessor-transformers
         - data-ref
         - dsp
@@ -150,7 +150,7 @@ packages:
         - explicit-exception
         - fixed-length
         - gnuplot
-        - group-by-date < 0 # build failure with GHC 8.4
+        - group-by-date < 0 # build failure with GHC 8.4 via hsshellscript
         - iff
         - interpolation
         - jack