diff --git a/app-dev.nix b/app-dev.nix
index 1f589df..f6adbec 100644
--- a/app-dev.nix
+++ b/app-dev.nix
@@ -16,5 +16,8 @@
     rustPlatform.rustc
     stack
     subversion
+
+    # visualisation
+    gource
   ];
 }
diff --git a/desktop.nix b/desktop.nix
index cea3108..07ff465 100644
--- a/desktop.nix
+++ b/desktop.nix
@@ -16,6 +16,7 @@
     curlftpfs
     docker
     espeak
+    gcc # pour les appels depuis les scripts
     gnome3.seahorse
     gnuplot
     gpm