diff --git a/roles/haskell-dev.nix b/roles/haskell-dev.nix
index a0cf57b..93e29fa 100644
--- a/roles/haskell-dev.nix
+++ b/roles/haskell-dev.nix
@@ -4,9 +4,10 @@
 
 {
 
-  environment.systemPackages = with pkgs; [
-    haskellPackages.cabal-install   # Haskell software automation
-    haskellPackages.ghc             # Glasgow Haskell Compiler
+  environment.systemPackages = with pkgs.haskellPackages; [
+    cabal-install   # Haskell software automation
+    ghc             # Glasgow Haskell Compiler
+    hlint           # Haskell source linter
   ];
 
 }