diff --git a/build-constraints.yaml b/build-constraints.yaml
index c628189e..ca60a99b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2535,7 +2535,7 @@ packages:
         - deriving-compat
         - dotgen
         - echo
-        - eliminators
+        - eliminators < 0.9.1         # https://github.com/commercialhaskell/stackage/issues/6694
         - generic-deriving
         - ghc-bignum-orphans
         - hashmap
@@ -2551,8 +2551,8 @@ packages:
         - proxied
         - rdtsc
         - singleton-nats
-        - singletons-base
-        - singletons-th
+        - singletons-base < 3.1.1     # https://github.com/commercialhaskell/stackage/issues/6694
+        - singletons-th   < 3.1.1     # https://github.com/commercialhaskell/stackage/issues/6694
         - text-show
         - text-show-instances
         - th-abstraction
@@ -3327,8 +3327,8 @@ packages:
         - hpio
 
     "Richard Eisenberg <eir@cis.upenn.edu> @goldfirere":
-        - th-desugar
-        - singletons
+        - th-desugar  < 1.14    # https://github.com/commercialhaskell/stackage/issues/6695
+        - singletons  < 3.0.2
         - HUnit-approx
         - units-parser