diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index e54a745e2df6..59e95dcc3d77 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1939,4 +1939,7 @@ EOT
   # ghc-api-compat needlessly requires 8.10.5 exactly, but we have 8.10.6
   ghc-api-compat = doJailbreak super.ghc-api-compat;
 
+  # 2021-08-18: streamly-posix was released with hspec 2.8.2, but it works with older versions too.
+  streamly-posix = doJailbreak super.streamly-posix;
+
 } // import ./configuration-tensorflow.nix {inherit pkgs haskellLib;} self super