diff --git a/public/app-developpement-haskell.nix b/public/app-developpement-haskell.nix
index ad97fb2..fda0dbf 100644
--- a/public/app-developpement-haskell.nix
+++ b/public/app-developpement-haskell.nix
@@ -20,6 +20,7 @@ mkIf cfg.developpement-haskell {
     haskellPackages.stylish-haskell # qualité de code
     haskellPackages.hindent
     haskellPackages.hlint
+    haskellPackages.threadscope
 
     # Application perso
     haskellPackages.hahp