diff --git a/pkgs/development/tools/haskell/tar/0.4.0.1.nix b/pkgs/development/libraries/haskell/tar/default.nix
similarity index 100%
rename from pkgs/development/tools/haskell/tar/0.4.0.1.nix
rename to pkgs/development/libraries/haskell/tar/default.nix
diff --git a/pkgs/development/tools/haskell/tar/0.3.2.0.nix b/pkgs/development/tools/haskell/tar/0.3.2.0.nix
deleted file mode 100644
index 15bb647b5427..000000000000
--- a/pkgs/development/tools/haskell/tar/0.3.2.0.nix
+++ /dev/null
@@ -1,14 +0,0 @@
-{ cabal, filepath }:
-
-cabal.mkDerivation (self: {
-  pname = "tar";
-  version = "0.3.2.0";
-  sha256 = "0yplrfai8bwihyn18whi0jiz1qzll9hgbc37xcy2jkr28480jba9";
-  buildDepends = [ filepath ];
-  meta = {
-    description = "Reading, writing and manipulating \".tar\" archive files.";
-    license = self.stdenv.lib.licenses.bsd3;
-    platforms = self.ghc.meta.platforms;
-    maintainers = [ self.stdenv.lib.maintainers.andres ];
-  };
-})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 51b08f8c30c2..ae0717cdd527 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1999,9 +1999,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
     haskellSrcExts = self.haskellSrcExts_1_11_1;
   };
 
-  tar_0_3_2_0 = callPackage ../development/tools/haskell/tar/0.3.2.0.nix {};
-  tar_0_4_0_1 = callPackage ../development/tools/haskell/tar/0.4.0.1.nix {};
-  tar = self.tar_0_4_0_1;
+  tar = callPackage ../development/tools/haskell/tar {};
 
   threadscope = callPackage ../development/tools/haskell/threadscope {};