diff --git a/pkgs/development/libraries/haskell/Shellac/Shellac-haskeline.nix b/pkgs/development/libraries/haskell/Shellac/Shellac-haskeline.nix
index 4ce09964cc6..9f75a09ee69 100644
--- a/pkgs/development/libraries/haskell/Shellac/Shellac-haskeline.nix
+++ b/pkgs/development/libraries/haskell/Shellac/Shellac-haskeline.nix
@@ -5,6 +5,9 @@ cabal.mkDerivation (self: {
   version = "0.2.0.1";
   sha256 = "1xvs2ni83yyf7rx3ikmn2bkx20fyj03d03crqyyfw28mikhgv5br";
   buildDepends = [ haskeline mtl Shellac ];
+  patchPhase = ''
+    sed -i -e 's|mtl>=1.1 && < 2.1|mtl|' Shellac-haskeline.cabal
+  '';
   meta = {
     description = "Haskeline backend module for Shellac";
     license = self.stdenv.lib.licenses.bsd3;