add("git", lazyBool("the 'git' executable exists and provides the standard CLI", hasWorkingGit))
	add("GODEBUG", script.PrefixCondition("GODEBUG contains <suffix>", hasGodebug))
	add("GOEXPERIMENT", script.PrefixCondition("GOEXPERIMENT <suffix> is enabled", hasGoexperiment))
	add("go-builder", script.BoolCondition("GO_BUILDER_NAME is non-empty", testenv.Builder() != ""))

		fmt.Fprintf(os.Stderr, "HASH[%s]: %x\n", h.name, out)
	}
	if h.buf != nil {
		hashDebug.Lock()
		if hashDebug.m == nil {
			hashDebug.m = make(map[[HashSize]byte]string)
		}
		hashDebug.m[out] = h.buf.String()
		hashDebug.Unlock()
	}
	return out
}

// In GODEBUG=gocacheverify=1 mode,
// hashDebug holds the input to every computed hash ID,
// so that we can work backward from the ID involved in a