diff --git a/pkgs/development/tools/parsing/happy/1.18.10.nix b/pkgs/development/tools/parsing/happy/1.18.10.nix
new file mode 100644
index 00000000000..d342d3381c8
--- /dev/null
+++ b/pkgs/development/tools/parsing/happy/1.18.10.nix
@@ -0,0 +1,18 @@
+{ cabal, mtl, perl }:
+
+cabal.mkDerivation (self: {
+  pname = "happy";
+  version = "1.18.10";
+  sha256 = "0jq6p5vvdh4wbam80q2d6j2fa6bmbgnbmqk1w9904x06g7vj1jf1";
+  isLibrary = false;
+  isExecutable = true;
+  buildDepends = [ mtl ];
+  buildTools = [ perl ];
+  meta = {
+    homepage = "http://www.haskell.org/happy/";
+    description = "Happy is a parser generator for Haskell";
+    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 d4ad6e0f0d0..bece113741c 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -123,7 +123,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
     cgi          = self.cgi_3001_1_8_3;         # 7.6 ok
     fgl          = self.fgl_5_4_2_4;            # 7.6 ok
     GLUT         = self.GLUT_2_3_0_0;           # 7.6 ok
-    haskellSrc   = self.haskellSrc_1_0_1_5;     # 7.6 fail
+    haskellSrc   = self.haskellSrc_1_0_1_5;     # 7.6 ok
     html         = self.html_1_0_1_2;           # 7.6 ok
     HTTP         = self.HTTP_4000_2_5;          # 7.6 ok
     HUnit        = self.HUnit_1_2_5_1;          # 7.6 ok
@@ -146,7 +146,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
     cabalInstall = self.cabalInstall_0_14_0;    # 7.6 ok
     alex         = self.alex_3_0_1;             # 7.6 ok
     haddock      = self.haddock_2_12_0;         # 7.6 ok
-    happy        = self.happy_1_18_9;           # 7.6 fail
+    happy        = self.happy_1_18_10;          # 7.6 ok
   };
 
   haskellPlatformArgs_2012_2_0_0 = self : {
@@ -1763,7 +1763,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
   happy_1_18_6 = callPackage ../development/tools/parsing/happy/1.18.6.nix {};
   happy_1_18_8 = callPackage ../development/tools/parsing/happy/1.18.8.nix {};
   happy_1_18_9 = callPackage ../development/tools/parsing/happy/1.18.9.nix {};
-  happy = self.happy_1_18_9;
+  happy_1_18_10 = callPackage ../development/tools/parsing/happy/1.18.10.nix {};
+  happy = self.happy_1_18_10;
 
   happyMeta = callPackage ../development/tools/haskell/happy-meta {};