anchor.diff:  
           rm /mnt/.debug
   
  -        ${utillinux}/bin/umount /mnt/nix/store /mnt/tmp /mnt/proc
  +        ${utillinux}/bin/umount /mnt/nix/store /mnt/tmp ${lib.optionalString unifiedSystemDir /mnt/proc}
           ${utillinux}/bin/umount /mnt
         '';
   
  
positive.code:           ln -s /usr/sbin /mnt/sbin
            ln -s /usr/lib /mnt/lib
            ln -s /usr/lib64 /mnt/lib64
          ''}
  
          echo "unpacking RPMs..."
  
negative.code: 
          chroot=$(type -tP chroot)
  
          # Make the Nix store available in /mnt, because that's where the RPMs live.
          mkdir -p /mnt/nix/store
          ${utillinux}/bin/mount -o bind /nix/store /mnt/nix/store
  