diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
index 73e31a03c29e..529627df1171 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
@@ -182,9 +182,6 @@ self: super: {
             in addBuildDepends jsaddle' [ self.glib self.gtk3 self.webkitgtk3
                                           self.webkitgtk3-javascriptcore ];
 
-  # Fix evaluation in GHC >=7.8: https://github.com/lambdabot/lambdabot/issues/116
-  lambdabot = appendPatch super.lambdabot ./lambdabot-fix-ghc78.patch;
-
   # https://github.com/haskell-infra/hackage-trustees/issues/24
   brainfuck = appendPatch super.brainfuck ./brainfuck-fix-ghc710.patch;
   unlambda = appendPatch super.unlambda ./unlambda-fix-ghc710.patch;
diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
index 21fdc86d89a6..361d404412ea 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
@@ -123,9 +123,6 @@ self: super: {
             in addBuildDepends jsaddle' [ self.glib self.gtk3 self.webkitgtk3
                                           self.webkitgtk3-javascriptcore ];
 
-  # Fix evaluation in GHC >=7.8: https://github.com/lambdabot/lambdabot/issues/116
-  lambdabot = appendPatch super.lambdabot ./lambdabot-fix-ghc78.patch;
-
   # Needs hashable on pre 7.10.x compilers.
   nats = addBuildDepend super.nats self.hashable;
 
diff --git a/pkgs/development/haskell-modules/lambdabot-fix-ghc78.patch b/pkgs/development/haskell-modules/lambdabot-fix-ghc78.patch
deleted file mode 100644
index 0a0ed65803a0..000000000000
--- a/pkgs/development/haskell-modules/lambdabot-fix-ghc78.patch
+++ /dev/null
@@ -1,22 +0,0 @@
-diff -ru3 lambdabot-5.0.1.old/State/L.hs lambdabot-5.0.1/State/L.hs
---- lambdabot-5.0.1.old/State/L.hs	2015-04-15 03:26:04.818947594 +0300
-+++ lambdabot-5.0.1/State/L.hs	2015-04-15 03:26:20.386099365 +0300
-@@ -34,7 +34,6 @@
- import Control.Monad
- import Control.Monad.Cont
- import Control.Monad.Identity
--import Control.Monad.Instances
- import Control.Monad.Reader
- import Control.Monad.ST.Safe
- import Control.Monad.State
-diff -ru3 lambdabot-5.0.1.old/State/Pristine.hs lambdabot-5.0.1/State/Pristine.hs
---- lambdabot-5.0.1.old/State/Pristine.hs	2015-04-15 03:26:04.818947594 +0300
-+++ lambdabot-5.0.1/State/Pristine.hs	2015-04-15 03:26:20.386099365 +0300
-@@ -34,7 +34,6 @@
- import Control.Monad
- import Control.Monad.Cont
- import Control.Monad.Identity
--import Control.Monad.Instances
- import Control.Monad.Reader
- import Control.Monad.ST.Safe
- import Control.Monad.State