diff --git a/lix/libstore/platform/linux.cc b/lix/libstore/platform/linux.cc
index b3f3a8e1d..8dd3a1855 100644
--- a/lix/libstore/platform/linux.cc
+++ b/lix/libstore/platform/linux.cc
@@ -1094,6 +1094,8 @@ bool LinuxLocalDerivationGoal::prepareChildSetup()
 {
     setupSyscallFilter();
 
+    KJ_DEFER(setPersonality(drv->platform));
+
     if (!useChroot) {
         return true;
     }
@@ -1352,8 +1354,6 @@ bool LinuxLocalDerivationGoal::prepareChildSetup()
         }
     }
 
-    setPersonality(drv->platform);
-
     return false;
 }