diff --git a/pkgs/development/libraries/haskell/hackage-db/default.nix b/pkgs/development/libraries/haskell/hackage-db/default.nix
index 3d873dc2073..37698cebb38 100644
--- a/pkgs/development/libraries/haskell/hackage-db/default.nix
+++ b/pkgs/development/libraries/haskell/hackage-db/default.nix
@@ -10,6 +10,9 @@ cabal.mkDerivation (self: {
     description = "provide access to the Hackage database via Data.Map";
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
-    maintainers = [ self.stdenv.lib.maintainers.andres self.stdenv.lib.maintainers.simons ];
+    maintainers = [
+      self.stdenv.lib.maintainers.andres
+      self.stdenv.lib.maintainers.simons
+    ];
   };
 })
diff --git a/pkgs/development/libraries/haskell/hsdns/default.nix b/pkgs/development/libraries/haskell/hsdns/default.nix
index af5fddda1c0..2a83df47f09 100644
--- a/pkgs/development/libraries/haskell/hsdns/default.nix
+++ b/pkgs/development/libraries/haskell/hsdns/default.nix
@@ -12,6 +12,9 @@ cabal.mkDerivation (self: {
     description = "Asynchronous DNS Resolver";
     license = "LGPL";
     platforms = self.ghc.meta.platforms;
-    maintainers = [ self.stdenv.lib.maintainers.andres self.stdenv.lib.maintainers.simons ];
+    maintainers = [
+      self.stdenv.lib.maintainers.andres
+      self.stdenv.lib.maintainers.simons
+    ];
   };
 })
diff --git a/pkgs/development/libraries/haskell/hsemail/default.nix b/pkgs/development/libraries/haskell/hsemail/default.nix
index c6dd1c6a568..f69789772ac 100644
--- a/pkgs/development/libraries/haskell/hsemail/default.nix
+++ b/pkgs/development/libraries/haskell/hsemail/default.nix
@@ -10,6 +10,9 @@ cabal.mkDerivation (self: {
     description = "Internet Message Parsers";
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
-    maintainers = [ self.stdenv.lib.maintainers.andres self.stdenv.lib.maintainers.simons ];
+    maintainers = [
+      self.stdenv.lib.maintainers.andres
+      self.stdenv.lib.maintainers.simons
+    ];
   };
 })
diff --git a/pkgs/development/libraries/haskell/streamproc/default.nix b/pkgs/development/libraries/haskell/streamproc/default.nix
index 88799c9318a..fef81d92212 100644
--- a/pkgs/development/libraries/haskell/streamproc/default.nix
+++ b/pkgs/development/libraries/haskell/streamproc/default.nix
@@ -9,6 +9,9 @@ cabal.mkDerivation (self: {
     description = "Stream Processer Arrow";
     license = self.stdenv.lib.licenses.bsd3;
     platforms = self.ghc.meta.platforms;
-    maintainers = [ self.stdenv.lib.maintainers.andres self.stdenv.lib.maintainers.simons ];
+    maintainers = [
+      self.stdenv.lib.maintainers.andres
+      self.stdenv.lib.maintainers.simons
+    ];
   };
 })