diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 0e05399d3912..958d1670adbc 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1802,4 +1802,8 @@ self: super: {
   # PR pending https://github.com/glguy/language-lua/pull/6
   language-lua = doJailbreak super.language-lua;
 
+  # 2021-04-09: too strict time bound
+  # PR pending https://github.com/zohl/cereal-time/pull/2
+  cereal-time = doJailbreak super.cereal-time;
+
 } // import ./configuration-tensorflow.nix {inherit pkgs haskellLib;} self super
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix.yaml
index 6e92c33558a0..a77610fbd148 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix.yaml
@@ -4051,7 +4051,6 @@ broken-packages:
   - cereal-io-streams
   - cereal-plus
   - cereal-streams
-  - cereal-time
   - certificate
   - cf
   - cfenv