diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.10.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.10.x.nix
index 74889c4c0877..4e71c26a504b 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.10.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.10.x.nix
@@ -152,4 +152,8 @@ self: super: {
 
   # doctest-parallel dependency requires newer Cabal
   regex-tdfa = dontCheck super.regex-tdfa;
+
+  # Unnecessarily strict lower bound on base
+  # https://github.com/mrkkrp/megaparsec/pull/485#issuecomment-1250051823
+  megaparsec = doJailbreak super.megaparsec;
 }
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
index 3650766cfd48..48cb8ed8c085 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
@@ -178,4 +178,8 @@ self: super: {
 
   # doctest-parallel dependency requires newer Cabal
   regex-tdfa = dontCheck super.regex-tdfa;
+
+  # Unnecessarily strict lower bound on base
+  # https://github.com/mrkkrp/megaparsec/pull/485#issuecomment-1250051823
+  megaparsec = doJailbreak super.megaparsec;
 }