diff --git a/modules/system/boot/stage-2-init.sh b/modules/system/boot/stage-2-init.sh
index fdc8a0161ea5..5bee0380003c 100644
--- a/modules/system/boot/stage-2-init.sh
+++ b/modules/system/boot/stage-2-init.sh
@@ -182,7 +182,7 @@ if [ -n "$debug2" ]; then
     done
 
     echo "Debug shell called from @out@"
-    setsid @shell@ < /dev/$console >/dev/$console 2>/dev/$console
+    setsid @shellDebug@ < /dev/$console >/dev/$console 2>/dev/$console
 fi
 
 
diff --git a/modules/system/boot/stage-2.nix b/modules/system/boot/stage-2.nix
index db867ab8a28c..35b1aead1b03 100644
--- a/modules/system/boot/stage-2.nix
+++ b/modules/system/boot/stage-2.nix
@@ -49,7 +49,7 @@ let
 
   bootStage2 = pkgs.substituteAll {
     src = ./stage-2-init.sh;
-    shell = "${pkgs.bashInteractive}/bin/bash";
+    shellDebug = "${pkgs.bashInteractive}/bin/bash";
     isExecutable = true;
     inherit kernel;
     inherit (config.boot) devShmSize runSize;