Can't build rust-by-example static site

output.md

Peters-MacBook-Pro:rust-by-example peter$ make all
./setup-stage.sh
Checked out revision 110.
cargo run
     Running `target/update`
json: couldn't open examples/staging/json/input.md
json-enum: couldn't open examples/staging/json/json-enum/input.md
decodable: couldn't open examples/staging/json/decodable/input.md
encodable: couldn't open examples/staging/json/encodable/input.md
assert: couldn't open examples/todo/assert/input.md
green: couldn't open examples/todo/green/input.md
log: couldn't open examples/todo/log/input.md
rc: couldn't open examples/todo/rc/input.md
regex: couldn't open examples/todo/regex/input.md
rustdoc: couldn't open examples/todo/rustdoc/input.md
select: couldn't open examples/todo/select/input.md
stdio: couldn't open examples/todo/stdio/input.md