rec { shell = "@bash@"; path = "@coreutils@"; system = "@system@"; shared = builtins.getEnv "_NIX_TEST_SHARED"; mkDerivation = args: derivation ({ inherit system; builder = shell; args = ["-e" args.builder or (builtins.toFile "builder-${args.name}.sh" "if [ -e .attrs.sh ]; then source .attrs.sh; fi; eval \"$buildCommand\"")]; PATH = path; } // removeAttrs args ["builder" "meta"]) // { meta = args.meta or {}; }; }