diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 7bd540c8578e..d3f62b5ef35a 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -914,15 +914,6 @@ self: super: {
   language-puppet = dontHaddock super.language-puppet;
   filecache = overrideCabal super.filecache (drv: { doCheck = !pkgs.stdenv.isDarwin; });
 
-  # Missing FlexibleContexts in testsuite
-  # https://github.com/EduardSergeev/monad-memo/pull/4
-  monad-memo =
-    let patch = pkgs.fetchpatch
-          { url = https://github.com/EduardSergeev/monad-memo/pull/4.patch;
-            sha256 = "14mf9940arilg6v54w9bc4z567rfbmm7gknsklv965fr7jpinxxj";
-          };
-    in appendPatch super.monad-memo patch;
-
   # https://github.com/alphaHeavy/protobuf/issues/34
   protobuf = dontCheck super.protobuf;