diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 4519be65c0b3..9cee0c21f566 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1811,10 +1811,6 @@ self: super: {
   # tests seem to require a different version of hspec-core
   hspec-contrib = dontCheck super.hspec-contrib;
 
-  # github.com/ucsd-progsys/liquidhaskell/issues/1729
-  liquidhaskell-boot = super.liquidhaskell-boot.override { Diff = self.Diff_0_3_4; };
-  Diff_0_3_4 = dontCheck super.Diff_0_3_4;
-
   # The test suite attempts to read `/etc/resolv.conf`, which doesn't work in the sandbox.
   domain-auth = dontCheck super.domain-auth;
 
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index 17dc7d700fb2..315fe82f24a9 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -46,7 +46,6 @@ extra-packages:
   - Cabal == 3.10.*
   - Cabal == 3.12.*                     # version required for cabal-install and other packages
   - Cabal-syntax == 3.12.*              # version required for cabal-install and other packages
-  - Diff < 0.4                          # required by liquidhaskell-0.8.10.2: https://github.com/ucsd-progsys/liquidhaskell/issues/1729
   - aeson < 2                           # required by pantry-0.5.2
   - apply-refact == 0.9.*               # 2022-12-12: needed for GHC < 9.2
   - apply-refact == 0.11.*              # 2023-02-02: needed for hls-hlint-plugin on GHC 9.2
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 488f29981197..7c502b0fa321 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -4847,24 +4847,6 @@ self: {
        broken = true;
      }) {};
 
-  "Diff_0_3_4" = callPackage
-    ({ mkDerivation, array, base, directory, pretty, process
-     , QuickCheck, test-framework, test-framework-quickcheck2
-     }:
-     mkDerivation {
-       pname = "Diff";
-       version = "0.3.4";
-       sha256 = "0bqcdvhxx8dmqc3793m6axg813wv9ldz2j37f1wygbbrbbndmdvp";
-       libraryHaskellDepends = [ array base pretty ];
-       testHaskellDepends = [
-         array base directory pretty process QuickCheck test-framework
-         test-framework-quickcheck2
-       ];
-       description = "O(ND) diff algorithm in haskell";
-       license = lib.licenses.bsd3;
-       hydraPlatforms = lib.platforms.none;
-     }) {};
-
   "Diff" = callPackage
     ({ mkDerivation, array, base, directory, pretty, process
      , QuickCheck, test-framework, test-framework-quickcheck2