3 files changed, 31 insertions, 0 deletions
diff --git a/pkgs/development/libraries/haskell/either/default.nix b/pkgs/development/libraries/haskell/either/default.nix
new file mode 100644
index 0000000000000..3d293d3b86e60
--- /dev/null
+++ b/pkgs/development/libraries/haskell/either/default.nix
@@ -0,0 +1,14 @@
+{ cabal, semigroupoids, semigroups, transformers }:
+
+cabal.mkDerivation (self: {
+  pname = "either";
+  version = "3.0.2";
+  sha256 = "1s3rpxxqc9052hrmiznwqwxhl4826qzbgpivpv5acxfhm0w06lhg";
+  buildDepends = [ semigroupoids semigroups transformers ];
+  meta = {
+    homepage = "http://github.com/ekmett/either/";
+    description = "Haskell 98 either monad transformer";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/development/libraries/haskell/errors/default.nix b/pkgs/development/libraries/haskell/errors/default.nix
new file mode 100644
index 0000000000000..d2e68670eb0e9
--- /dev/null
+++ b/pkgs/development/libraries/haskell/errors/default.nix
@@ -0,0 +1,13 @@
+{ cabal, either, safe, transformers }:
+
+cabal.mkDerivation (self: {
+  pname = "errors";
+  version = "1.3.1";
+  sha256 = "0vfpnpkiz362bvjyaf35spfk3h6vw7xi1x3f8agzs7kmxrdvrfik";
+  buildDepends = [ either safe transformers ];
+  meta = {
+    description = "Simplified error-handling";
+    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 6cdb7bd3468ce..c94267e1491aa 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -750,6 +750,10 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   erf = callPackage ../development/libraries/haskell/erf {};
 
+  errors = callPackage ../development/libraries/haskell/errors {};
+
+  either = callPackage ../development/libraries/haskell/either {};
+
   exceptionMtl = callPackage ../development/libraries/haskell/exception-mtl {};
 
   exceptionTransformers = callPackage ../development/libraries/haskell/exception-transformers {};