diff --git a/pkgs/development/haskell-modules/configuration-ghc-9.4.x.nix b/pkgs/development/haskell-modules/configuration-ghc-9.4.x.nix
index eb07497f3eed..dbe2b0a2a781 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.4.x.nix
@@ -104,9 +104,6 @@ self: super: {
     ++ drv.testFlags or [ ];
   }) (doJailbreak super.hpack);
 
-  # Later versions require unix >= 2.8 which is tricky to provide with GHC 9.4
-  crypton-x509-store = doDistribute self.crypton-x509-store_1_6_11;
-
   # 2022-08-01: Tests are broken on ghc 9.2.4: https://github.com/wz1000/HieDb/issues/46
   hiedb = dontCheck super.hiedb;
 
@@ -176,4 +173,5 @@ self: super: {
 
   # Too strict lower bound on base
   primitive-addr = doJailbreak super.primitive-addr;
+  base64 = doJailbreak super.base64;
 }
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index 5d63ae1ac2f9..d145018fb93c 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -79,7 +79,6 @@ extra-packages:
   - Cabal-syntax == 3.12.*
   - Cabal-syntax == 3.14.*
   - Cabal-syntax == 3.16.*              # version required for cabal-install and other packages
-  - crypton-x509-store < 1.6.12         # 2025-11-22: requires unix >= 2.8 which isn't available for GHC < 9.6
   - extensions == 0.1.0.1               # 2025-09-21: needed for Cabal 3.10 (fourmolo/ormolu with ghc 9.8)
   - fourmolu == 0.14.0.0                # 2023-11-13: for ghc-lib-parser 9.6 compat
   - fourmolu == 0.15.0.0                # 2025-09-21: for ghc-lib-parser 9.8 compat
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 6efa1f5a959d..922de7c5d140 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -175049,55 +175049,6 @@ self: {
     }
   ) { };
 
-  crypton-x509-store_1_6_11 = callPackage (
-    {
-      mkDerivation,
-      asn1-encoding,
-      asn1-types,
-      base,
-      bytestring,
-      containers,
-      crypton,
-      crypton-x509,
-      directory,
-      filepath,
-      mtl,
-      pem,
-      tasty,
-      tasty-hunit,
-    }:
-    mkDerivation {
-      pname = "crypton-x509-store";
-      version = "1.6.11";
-      sha256 = "07vq7f883cm5krqz2kc0qkh9ks54jknrwdqvfqsk91s12b693a83";
-      revision = "1";
-      editedCabalFile = "02cjsx9pijk2wlhk2i977dr1ak647yywl71fcw1b6j54k1swafm6";
-      libraryHaskellDepends = [
-        asn1-encoding
-        asn1-types
-        base
-        bytestring
-        containers
-        crypton
-        crypton-x509
-        directory
-        filepath
-        mtl
-        pem
-      ];
-      testHaskellDepends = [
-        base
-        bytestring
-        crypton-x509
-        tasty
-        tasty-hunit
-      ];
-      description = "X.509 collection accessing and storing methods";
-      license = lib.licenses.bsd3;
-      hydraPlatforms = lib.platforms.none;
-    }
-  ) { };
-
   crypton-x509-store = callPackage (
     {
       mkDerivation,