diff --git a/machines/web02/cas-eleves/default.nix b/machines/web02/cas-eleves/default.nix
index 5dff18c..2d546c7 100644
--- a/machines/web02/cas-eleves/default.nix
+++ b/machines/web02/cas-eleves/default.nix
@@ -54,11 +54,10 @@ let
       export CREDENTIALS_DIRECTORY=$(pwd)/.credentials
     '';
 
-    buildPhase = ''
-      mkdir -p $out/static
-    '';
+    doBuild = false;
 
     installPhase = ''
+      mkdir -p $out/static
       python3 manage.py collectstatic
     '';
   };