# bash
 setting BASH_ENV sources it before

execve("/bin/bash", { "/bin/bash", "build.sh", NULL }, { env..., "BASH_ENV=file", NULL});


build() {
}
package() {
}

default: /tmp

--noclean:
check for $snagcache/$packagename/
if not exist full clean build
if exist then just run build and install


open log file - fd 3
splice(child stdout, fd 3)