Many times I've just patched the binary even if source is available, because trying to reproduce the binary you currently have, with only the changes you want and everything else the same, can be an even more difficult exercise than simply changing a string or constant.

Lol I remember doing this when I was younger with the `man` command to remove a 5 second exit delay for the browser output.

    radare2 -qq -w -c "wx 01 @ 0xb407" /usr/bin/man

Especially if you make a habit of patching the binary instead of rebuilding from source! ;)