diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 29627ab88bd76..e2e629424f94d 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -3214,6 +3214,16 @@ with haskellLib;
 
   # 2025-5-15: Too strict bounds on base <4.19, see: https://github.com/zachjs/sv2v/issues/317
   sv2v = doJailbreak super.sv2v;
+
+  # 2025-06-25: Upper bounds of transformers and bytestring too strict,
+  # as haskore 0.2.0.8 was released in 2016 and is quite outdated.
+  # Tests fail with:
+  #   ### Error in:   11:comparison with MIDI files generated by former Haskore versions:23:Ssf:1
+  #   src/Test/MIDI/Ssf.mid: openBinaryFile: does not exist (No such file or directory)
+  # Necessary files aren't listed in extra-source-files in the cabal file
+  # and therefore aren't uploaded to hackage
+  # Needs to be fixed upstream
+  haskore = dontCheck (doJailbreak super.haskore);
 }
 // import ./configuration-tensorflow.nix { inherit pkgs haskellLib; } self super
 
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/broken.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/broken.yaml
index 90238ac8c43b3..35c52927e98ee 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/broken.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/broken.yaml
@@ -2465,7 +2465,6 @@ broken-packages:
   - haskoin # failure in job https://hydra.nixos.org/build/233201668 at 2023-09-02
   - haskoin-util # failure in job https://hydra.nixos.org/build/233222171 at 2023-09-02
   - haskoin-wallet # failure in job https://hydra.nixos.org/build/233206922 at 2023-09-02
-  - haskore # failure in job https://hydra.nixos.org/build/233238668 at 2023-09-02
   - haskore-vintage # failure in job https://hydra.nixos.org/build/233230742 at 2023-09-02
   - HaskRel # failure in job https://hydra.nixos.org/build/295090970 at 2025-04-22
   - hasktorch-codegen # failure in job https://hydra.nixos.org/build/233232876 at 2023-09-02
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index d83d90f7c287b..ffb6c54330657 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -308296,8 +308296,6 @@ self: {
       ];
       description = "The Haskore Computer Music System";
       license = "GPL";
-      hydraPlatforms = lib.platforms.none;
-      broken = true;
     }
   ) { };