diff --git a/pkgs/development/libraries/haskell/trifecta/1.1.nix b/pkgs/development/libraries/haskell/trifecta/1.1.nix
new file mode 100644
index 00000000000..ac6cfdd43ae
--- /dev/null
+++ b/pkgs/development/libraries/haskell/trifecta/1.1.nix
@@ -0,0 +1,30 @@
+{ cabal, ansiTerminal, ansiWlPprint, blazeBuilder, blazeHtml
+, blazeMarkup, charset, comonad, deepseq, doctest, filepath
+, fingertree, hashable, lens, mtl, parsers, reducers, semigroups
+, transformers, unorderedContainers, utf8String
+}:
+
+cabal.mkDerivation (self: {
+  pname = "trifecta";
+  version = "1.1";
+  sha256 = "19wnblpn31hvdi5dc8ir24s0hfjj4vvzr43gg9ydl2qdjq6s166w";
+  buildDepends = [
+    ansiTerminal ansiWlPprint blazeBuilder blazeHtml blazeMarkup
+    charset comonad deepseq fingertree hashable lens mtl parsers
+    reducers semigroups transformers unorderedContainers utf8String
+  ];
+  testDepends = [ doctest filepath ];
+  postPatch = ''
+    substituteInPlace trifecta.cabal \
+      --replace "blaze-html           >= 0.5     && < 0.6," "blaze-html           >= 0.5     && < 0.7," \
+      --replace "hashable             >= 1.2     && < 1.3," "hashable             >= 1.1     && < 1.3," \
+      --replace "fingertree           >= 0.0.1   && < 0.1," "fingertree           >= 0.0.1   && < 0.2," \
+      --replace "comonad              == 3.*,"              "comonad              >= 3       && < 5,"
+  '';
+  meta = {
+    homepage = "http://github.com/ekmett/trifecta/";
+    description = "A modern parser combinator library with convenient diagnostics";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/development/libraries/haskell/trifecta/default.nix b/pkgs/development/libraries/haskell/trifecta/1.2.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/trifecta/default.nix
rename to pkgs/development/libraries/haskell/trifecta/1.2.nix
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index d23df701745..7dd5af49af4 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -2116,7 +2116,9 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   transformersCompat = callPackage ../development/libraries/haskell/transformers-compat {};
 
-  trifecta = callPackage ../development/libraries/haskell/trifecta {};
+  trifecta_1_1 = callPackage ../development/libraries/haskell/trifecta/1.1.nix {};
+  trifecta_1_2 = callPackage ../development/libraries/haskell/trifecta/1.2.nix {};
+  trifecta = self.trifecta_1_2;
 
   tuple = callPackage ../development/libraries/haskell/tuple {};
 
@@ -2442,7 +2444,9 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   darcs = callPackage ../applications/version-management/darcs {};
 
-  idris_plain = callPackage ../development/compilers/idris {};
+  idris_plain = callPackage ../development/compilers/idris {
+    trifecta = self.trifecta_1_1;
+  };
 
   idris = callPackage ../development/compilers/idris/wrapper.nix {};