diff --git a/pkgs/development/libraries/haskell/rfc5051/default.nix b/pkgs/development/libraries/haskell/rfc5051/default.nix
new file mode 100644
index 00000000000..8b5fc2e142b
--- /dev/null
+++ b/pkgs/development/libraries/haskell/rfc5051/default.nix
@@ -0,0 +1,14 @@
+{ cabal }:
+
+cabal.mkDerivation (self: {
+  pname = "rfc5051";
+  version = "0.1.0.2";
+  sha256 = "0j009h78gw92bl61g0js6xkah76lb6gm0lv55z2sw6gxm4a1ygml";
+  isLibrary = true;
+  isExecutable = true;
+  meta = {
+    description = "Simple unicode collation as per RFC5051";
+    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 14cf89c045e..3598ef7f4fc 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1817,6 +1817,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   resourcet = callPackage ../development/libraries/haskell/resourcet {};
 
+  rfc5051 = callPackage ../development/libraries/haskell/rfc5051 {};
+
   rosezipper = callPackage ../development/libraries/haskell/rosezipper {};
 
   RSA = callPackage ../development/libraries/haskell/RSA {};