}
        }

        Path installationToolchainsFile = null;
        if (context.options().altInstallationToolchains().isPresent()) {
            installationToolchainsFile = context.cwd.resolve(
                    context.options().altInstallationToolchains().get());

            if (!Files.isRegularFile(installationToolchainsFile)) {
                throw new FileNotFoundException(

        options.altUserToolchains()
                .ifPresent(userToolchains -> failIfFileNotExists(
                        context, userToolchains, "The specified user toolchains file does not exist"));
        options.altInstallationToolchains()
                .ifPresent(installationToolchains -> failIfFileNotExists(
                        context, installationToolchains, "The specified installation toolchains file does not exist"));

            return Optional.of(commandLine.getOptionValue(CLIManager.ALTERNATE_USER_TOOLCHAINS));
        }
        return Optional.empty();
    }

    @Override
    public Optional<String> altInstallationToolchains() {
        if (commandLine.hasOption(CLIManager.ALTERNATE_INSTALLATION_TOOLCHAINS)) {
            return Optional.of(commandLine.getOptionValue(CLIManager.ALTERNATE_INSTALLATION_TOOLCHAINS));
        }