FYI

I know absolutely nothing about LFS but simply browsing the packages.txt shows me that expect is not included in Knoppix. Interstingly enough Kanotix does have expect.

dpkg -l|grep expect
ii expect 5.41.0-1 A program that "talks" to other programs
ii expectk 5.41.0-1 A Tk/X11 version of the expect program