cd($lib->getSourceDir())->initializeEnv($lib) ->exec("make PREFIX='{$lib->getBuildRootPath()}' clean") ->exec("make -j{$builder->concurrency} PREFIX='{$lib->getBuildRootPath()}' libbz2.a") ->exec('cp libbz2.a ' . $lib->getLibDir()) ->exec('cp bzlib.h ' . $lib->getIncludeDir()); } }