diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index 535499be9efe..0565f4b66b12 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -26,6 +26,8 @@
 # keep-sorted start skip_lines=1 case=no numeric=yes
 default-package-overrides:
   - chs-cabal == 0.1.1.2 # matches Cabal 3.12 (GHC 9.10)
+  # 2025-12-26: Needs to match egison-pattern-src from Stackage LTS
+  - egison-pattern-src-th-mode < 0.2.2
   - extensions == 0.1.0.2 # matches Cabal 3.12 (GHC 9.10)
   # 2025-09-13: hnix 0.17.0 doesn't support hnix-store-core >= 0.8
   # https://github.com/haskell-nix/hnix/pull/1112
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 0d3ed642bd28..cbe83a9f18bc 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -212220,6 +212220,51 @@ self: {
   ) { };
 
   egison-pattern-src-th-mode = callPackage (
+    {
+      mkDerivation,
+      base,
+      egison-pattern-src,
+      haskell-src-exts,
+      haskell-src-meta,
+      mtl,
+      pretty,
+      tasty,
+      tasty-discover,
+      tasty-hunit,
+      template-haskell,
+      text,
+    }:
+    mkDerivation {
+      pname = "egison-pattern-src-th-mode";
+      version = "0.2.1.2";
+      sha256 = "0zm3ds6vcxhahcwwryhk8f65141f0bnzj6mxy681npzwzgvljiyd";
+      libraryHaskellDepends = [
+        base
+        egison-pattern-src
+        haskell-src-exts
+        haskell-src-meta
+        mtl
+        pretty
+        template-haskell
+        text
+      ];
+      testHaskellDepends = [
+        base
+        egison-pattern-src
+        haskell-src-exts
+        mtl
+        tasty
+        tasty-hunit
+        template-haskell
+        text
+      ];
+      testToolDepends = [ tasty-discover ];
+      description = "Parser and pretty printer for Egison pattern expressions to use with TH";
+      license = lib.licenses.bsd3;
+    }
+  ) { };
+
+  egison-pattern-src-th-mode_0_2_2_0 = callPackage (
     {
       mkDerivation,
       base,
@@ -212261,6 +212306,7 @@ self: {
       testToolDepends = [ tasty-discover ];
       description = "Parser and pretty printer for Egison pattern expressions to use with TH";
       license = lib.licenses.bsd3;
+      hydraPlatforms = lib.platforms.none;
     }
   ) { };