diff --git a/pkgs/development/libraries/haskell/case-insensitive/0.3.nix b/pkgs/development/libraries/haskell/case-insensitive/0.3.nix
deleted file mode 100644
index 6a59c9e840b7..000000000000
--- a/pkgs/development/libraries/haskell/case-insensitive/0.3.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-{ cabal, hashable, text }:
-
-cabal.mkDerivation (self: {
-  pname = "case-insensitive";
-  version = "0.3";
-  sha256 = "0k3y09ak4k0jwx7bh5awcznw064xgf6yzidq3jalif7m3c9bv5q7";
-  buildDepends = [ hashable text ];
-  meta = {
-    description = "Case insensitive string comparison";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    maintainers = [
-      self.stdenv.lib.maintainers.andres
-      self.stdenv.lib.maintainers.simons
-    ];
-  };
-})
diff --git a/pkgs/development/libraries/haskell/case-insensitive/0.3.0.1.nix b/pkgs/development/libraries/haskell/case-insensitive/default.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/case-insensitive/0.3.0.1.nix
rename to pkgs/development/libraries/haskell/case-insensitive/default.nix
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 3c89fe73e906..edd20a600cfe 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -436,9 +436,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
     inherit (pkgs) cairo zlib;
   };
 
-  caseInsensitive_0_3 = callPackage ../development/libraries/haskell/case-insensitive/0.3.nix {};
-  caseInsensitive_0_3_0_1 = callPackage ../development/libraries/haskell/case-insensitive/0.3.0.1.nix {};
-  caseInsensitive = self.caseInsensitive_0_3_0_1;
+  caseInsensitive = callPackage ../development/libraries/haskell/case-insensitive {};
 
   cautiousFile = callPackage ../development/libraries/haskell/cautious-file {};