diff --git a/lhcbnightlyconf/Gauss.py b/lhcbnightlyconf/Gauss.py
index 7ca9a3f98413ad84b0ee7179bbc2693ebce5a0c0..42e2b26f6d16f0a695b229bf724f0636a58043f2 100644
--- a/lhcbnightlyconf/Gauss.py
+++ b/lhcbnightlyconf/Gauss.py
@@ -287,7 +287,6 @@ gaussSim11Dev = create_gaussino_slot(
     'lhcb-sim11-dev',
     'Build of Gauss-on-Gsino to test simulation MR not yet for release independently of LHCb development',
     platforms=DEV11_PLATFORMS)
-gaussSim11Dev.projects.append(LCGToolchains("gcorti_pythia8_240_gcc13"))
 slots.append(gaussSim11Dev)
 
 # Slot for Sim11 run5 to check future MR not yet ready for release but that need stable environment