jordansissel/fpm · error · FPM::Util::ExecutableNotFound

Could not find any python interpreter. Tried the following:

Error message

Could not find any python interpreter. Tried the following: #{pythons.join(", ")}

What it means

Error "Could not find any python interpreter. Tried the following: #{pythons.join(", ")}" thrown in jordansissel/fpm.

Source

Thrown at lib/fpm/package/python.rb:373

      path_to_package = ::Dir.glob(build_path("*.whl")).first
      if path_to_package.nil?
        raise FPM::InvalidPackageConfiguration, "Failed building python package format - fpm tried to build a python wheel, but didn't find the .whl file. This might be a bug in fpm."
      end

    end

    load_package_info(path_to_package)
    install_to_staging(path_to_package)
  end # def input

  def explore_environment
    if !attributes[:python_bin_given?]
      # If --python-bin isn't set, try to find a good default python executable path, because it might not be "python"
      pythons = [ "python", "python3", "python2" ]
      default_python = pythons.find { |py| program_exists?(py) }

      if default_python.nil?
        raise FPM::Util::ExecutableNotFound, "Could not find any python interpreter. Tried the following: #{pythons.join(", ")}"
      end

      logger.info("Setting default python executable", :name => default_python)
      attributes[:python_bin] = default_python

      if !attributes[:python_package_name_prefix_given?]
        attributes[:python_package_name_prefix] = default_python
        logger.info("Setting package name prefix", :name => default_python)
      end
    end

    if attributes[:python_internal_pip?]
      # XXX: Should we detect if internal pip is available?
      attributes[:python_pip] = [ attributes[:python_bin], "-m", "pip"]
    end
  end # explore_environment

View on GitHub (pinned to b6d77ba72a)

When it happens

Trigger: Thrown at lib/fpm/package/python.rb:373 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of jordansissel/fpm@b6d77ba72a (2026-08-21). Data as JSON: /api/errors/0fd2fc505c42685f. Report an issue: GitHub.