diff --git a/pkgs/development/libraries/haskell/yap/default.nix b/pkgs/development/libraries/haskell/yap/default.nix
new file mode 100644
index 00000000000..4d16496fd13
--- /dev/null
+++ b/pkgs/development/libraries/haskell/yap/default.nix
@@ -0,0 +1,15 @@
+{ cabal }:
+
+cabal.mkDerivation (self: {
+  pname = "yap";
+  version = "0.0";
+  sha256 = "0cjsmf9p220fb9yf2i81xspa3rpnlln3hfb9yc5x6xbcc6py0nw5";
+  meta = {
+    description = "yet another prelude - a simplistic refactoring with algebraic classes";
+    license = self.stdenv.lib.licenses.bsd3;
+    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 691f3ef2500..a71e122cd7f 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1281,6 +1281,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   xssSanitize = callPackage ../development/libraries/haskell/xss-sanitize {};
 
+  yap = callPackage ../development/libraries/haskell/yap {};
+
   yesod = callPackage ../development/libraries/haskell/yesod {};
 
   yesodAuth = callPackage ../development/libraries/haskell/yesod-auth {};