diff --git a/pkgs/development/tools/haskell/packunused/default.nix b/pkgs/development/tools/haskell/packunused/default.nix
new file mode 100644
index 00000000000..814c2774cb2
--- /dev/null
+++ b/pkgs/development/tools/haskell/packunused/default.nix
@@ -0,0 +1,16 @@
+{ cabal, Cabal, cmdargs, filepath, haskellSrcExts }:
+
+cabal.mkDerivation (self: {
+  pname = "packunused";
+  version = "0.1.0.0";
+  sha256 = "131x99id3jcxglj24p5sjb6mnhphj925pp4jdjy09y6ai7wss3rs";
+  isLibrary = false;
+  isExecutable = true;
+  buildDepends = [ Cabal cmdargs filepath haskellSrcExts ];
+  meta = {
+    homepage = "https://github.com/hvr/packunused";
+    description = "Tool for detecting redundant Cabal package dependencies";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index b4f5f66b8f2..39d6a58aeab 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -2093,6 +2093,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   myhasktags = callPackage ../tools/misc/myhasktags {};
 
+  packunused = callPackage ../development/tools/haskell/packunused {};
+
   splot = callPackage ../development/tools/haskell/splot {};
 
   timeplot = callPackage ../development/tools/haskell/timeplot {};