diff --git a/pkgs/development/libraries/haskell/derp/default.nix b/pkgs/development/libraries/haskell/derp/default.nix
index 5595c909aa07..ca702b60356c 100644
--- a/pkgs/development/libraries/haskell/derp/default.nix
+++ b/pkgs/development/libraries/haskell/derp/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "derp";
-  version = "0.1.5";
-  sha256 = "0mpc4hav5iqrcjns5sz8q0v2c0d7nb2hbzn58cmbl7cma2kp36li";
+  version = "0.1.6";
+  sha256 = "0g8y98qjjampbwnxhvjzrs2jczh2mcwsacjq95jxpidgsld00shk";
   meta = {
     description = "Derivative Parsing";
     license = self.stdenv.lib.licenses.bsd3;
diff --git a/pkgs/development/libraries/haskell/happstack/happstack-server.nix b/pkgs/development/libraries/haskell/happstack/happstack-server.nix
index f02586d51a44..29ba6b50d8f1 100644
--- a/pkgs/development/libraries/haskell/happstack/happstack-server.nix
+++ b/pkgs/development/libraries/haskell/happstack/happstack-server.nix
@@ -6,8 +6,8 @@
 
 cabal.mkDerivation (self: {
   pname = "happstack-server";
-  version = "6.6.4";
-  sha256 = "1bdgazyrin7flfqi5ix8pp3ldisb101s4p8539h19xc8jw22x6sk";
+  version = "6.6.5";
+  sha256 = "1s0sa0sk2g6q55xwmzzdca327kp7mhxwc4dlg8lrdqa4dr3hm3gj";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [
diff --git a/pkgs/development/tools/haskell/hlint/default.nix b/pkgs/development/tools/haskell/hlint/default.nix
index 074695a8247c..2945a661a36a 100644
--- a/pkgs/development/tools/haskell/hlint/default.nix
+++ b/pkgs/development/tools/haskell/hlint/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "hlint";
-  version = "1.8.25";
-  sha256 = "1pxdkwqg04hjynck06ib94spjviri3y1ivhagc8icwjwlizbn5ib";
+  version = "1.8.26";
+  sha256 = "001id2853bkxnbh7jc0bvfyq7v9595zn31n7hhma3il0dqim71lp";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [