diff --git a/windmill-worker/nsjail/download.py.config.proto b/windmill-worker/nsjail/download.py.config.proto
index 5c2989417..7896bde7a 100644
--- a/windmill-worker/nsjail/download.py.config.proto
+++ b/windmill-worker/nsjail/download.py.config.proto
@@ -22,17 +22,24 @@ keep_caps: true
 keep_env: true
 mount_proc: true
 
+mount {
+    src: "/nix/store"
+    dst: "/nix/store"
+	is_bind: true
+}
 
 mount {
     src: "/bin"
     dst: "/bin"
 	is_bind: true
+    mandatory: false
 }
 
 mount {
     src: "/lib"
     dst: "/lib"
 	is_bind: true
+    mandatory: false
 }
 
 mount {
@@ -46,6 +53,7 @@ mount {
     src: "/usr"
     dst: "/usr"
 	is_bind: true
+    mandatory: false
 }
 
 mount {