[squashme] elaborate comment on unpack-bootstrap-files.sh

# sanity check

$out/bin/true || exit 1

# scorched earth

# meticulously replace every nix store path with the right one

# to work with binaries, make sure the path remains the same length by prefixing pathsep chars

for f in $(find $out -type f); do

    while true; do

        BADMAN="$(strings $f | grep -o '/nix/store/.*' | grep -v "$out" | head -n1)"