diff --git a/pkgs/development/tools/haskell/tar/default.nix b/pkgs/development/tools/haskell/tar/0.3.2.0.nix
similarity index 100%
rename from pkgs/development/tools/haskell/tar/default.nix
rename to pkgs/development/tools/haskell/tar/0.3.2.0.nix
diff --git a/pkgs/development/tools/haskell/tar/0.4.0.0.nix b/pkgs/development/tools/haskell/tar/0.4.0.0.nix
new file mode 100644
index 000000000000..70afaa4aa6ae
--- /dev/null
+++ b/pkgs/development/tools/haskell/tar/0.4.0.0.nix
@@ -0,0 +1,16 @@
+{ cabal }:
+
+cabal.mkDerivation (self: {
+  pname = "tar";
+  version = "0.4.0.0";
+  sha256 = "04qijdfyiqb64q58g0bf46qfgaxqjl3kl68x6z31cv36p3hpplx3";
+  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
+      self.stdenv.lib.maintainers.simons
+    ];
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index f4f7906a4d35..3f860fe94444 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1604,7 +1604,9 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   SourceGraph = callPackage ../development/tools/haskell/SourceGraph {};
 
-  tar = callPackage ../development/tools/haskell/tar {};
+  tar_0_3_2_0 = callPackage ../development/tools/haskell/tar/0.3.2.0.nix {};
+  tar_0_4_0_0 = callPackage ../development/tools/haskell/tar/0.4.0.0.nix {};
+  tar = self.tar_0_4_0_0;
 
   threadscope = callPackage ../development/tools/haskell/threadscope {};
 
@@ -1616,6 +1618,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   darcs = callPackage ../applications/version-management/darcs {
     regexCompat = self.regexCompat93;
+    tar = self.tar_0_3_2_0;
   };
 
   leksah = callPackage ../applications/editors/leksah {};