don't try to chroot inside chroot

Author: SolidEva

scripts/InstallScripts/InstallPackages.sh

@@ -106,7 +106,7 @@ then
   apt install -y ${gnome_debs_download[@]}
   apt install -y ${prawnos_gnome_debs_prebuilt_download[@]}
   #TODO remove once 3.38.2-1 or newer moves to bullseye, work around for #235
-  chroot $outmnt apt install -y -t sid libmutter-7-0 gir1.2-mutter-7 mutter-common
+  apt install -y -t sid libmutter-7-0 gir1.2-mutter-7 mutter-common
 
   #TODO: debug why rotation is flipped
   # work around issue #234