diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5dae82c6..15627148 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2265,7 +2265,7 @@ packages:
         - deriving-compat
         - dotgen
         - echo
-        - eliminators
+        - eliminators < 0.7 # GHC 8.10 via base-4.14 & template-haskell-2.16 
         - generic-deriving
         - hashmap
         - invariant
@@ -3069,7 +3069,7 @@ packages:
 
     "Richard Eisenberg <eir@cis.upenn.edu> @goldfirere":
         - th-desugar
-        - singletons
+        - singletons < 2.7 # GHC 8.10 via Cabal-3.2 & base-4.14
         - HUnit-approx
         - units-parser < 0 # BuildFailureException Process exited with ExitFailure 1: dist/build/main/main