.map(InstallationSupplier::get)
            .flatMap(Set::stream)
            .filter(this::installationExists)
            .map(this::canonicalize)
            .map(this::maybeGetEnclosedInstallation)
            .filter(this::installationHasExecutable)
            .filter(distinctByKey(InstallationLocation::getLocation))
            .collect(Collectors.toSet());
    }