diff --git a/build-constraints.yaml b/build-constraints.yaml
index 39000fa6..39e597c2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4488,20 +4488,12 @@ packages:
         - hsdev < 0.3.3.0
         - network-bsd < 2.8.1.0
 
-        # https://github.com/commercialhaskell/stackage/issues/4373
-        - dejafu < 2.0.0.0
-        - hunit-dejafu < 2.0.0.0
-        - tasty-dejafu < 2.0.0.0
-
         # https://github.com/simonmichael/hledger/issues/983
         - easytest < 0.3
 
         # https://github.com/commercialhaskell/stackage/issues/4441
         - checkers < 0.5.0
 
-        # https://github.com/commercialhaskell/stackage/issues/4443
-        - concurrency < 1.7
-
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of