docs: def install_pkgs(self, offline=False):
          """
          TODO: maybe use conda as python package
          """
          if not offline and self.pkgs:
              self.logger.info("Installing conda packages ...")
              cmd = [join(self.anaconda_home, 'bin', 'conda')]
              cmd.append('install')
              # if offline:
              #     cmd.append('--offline')
              #     self.logger.info("... offline mode ...")
              if not self.newest:
                  cmd.append('--no-update-deps')
                  self.logger.info("... no update dependencies ...")
              if self.env:
                  self.logger.info("... in conda environment %s ...", self.env)
                  cmd.extend(['-n', self.env])
              cmd.append('--yes')
              if self.no_pin:
                  cmd.append('--no-pin')
                  self.logger.info("... no pin ...")
              if self.channel_priority:
                  self.logger.info("... channel priority ...")
                  cmd.append('--channel-priority')
              if self.channels:
                  if self.override_channels:
                      self.logger.info('... override channels ...')
                      cmd.append('--override-channels')
                  self.logger.info("... with conda channels: %s ...",
                                   ', '.join(self.channels))
                  for channel in self.channels:
                      cmd.append('-c')
                      cmd.append(channel)
              cmd.extend(self.pkgs)
              try:
                  self.logger.debug("install_pkgs cmd: %s", cmd)
                  check_call(cmd)
              except CalledProcessError as err:
                  self.logger.error("Conda exited with errors: %s", err.output)
          return self.pkgs