Now you may be asking, what happens if the APE loader isn’t installed on my system? In that case, it’ll try to dd the 4kb copy of the APE loader that’s embedded within the host executable, out to the safest folder that’s guaranteed to work, namely ${TMPDIR:-${HOME:-.}}/.ape. If your operating system defines the POSIX-specified $TMPDIR variable, then the ape loader will become $TMPDIR/.ape. Otherwise if $HOME is defined, it’s dropped in in $HOME/.ape. Then, if neither is defined, ./.ape is created in the current directory