Ckan安装失败：未知的分发选项：'message_extractors'

我在虚拟环境中安装构建CKAN . 我在安装一些模块时遇到问题 .

(default)[ckan@localhost ~]$ pip install -e git+https://github.com/ckan/ckan.git@ckan-2.6.0#egg=ckan
Obtaining ckan from git+https://github.com/ckan/ckan.git@ckan-2.6.0#egg=ckan
  Updating ./default/src/ckan clone (to ckan-2.6.0)
  Running setup.py egg_info for package ckan
    /usr/lib64/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'message_extractors'
      warnings.warn(msg)

    no previously-included directories found matching '.git'
    warning: no files found matching 'CHANGELOG.txt'
    warning: no files found matching '*' under directory 'ckan_deb'
Installing collected packages: ckan
  Running setup.py develop for ckan
    /usr/lib64/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'message_extractors'
      warnings.warn(msg)

    no previously-included directories found matching '.git'
    warning: no files found matching 'CHANGELOG.txt'
    warning: no files found matching '*' under directory 'ckan_deb'
    Creating /usr/lib/ckan/default/lib/python2.7/site-packages/ckan.egg-link (link to .)
    ckan 2.6.0 is already the active version in easy-install.pth
    Installing ckan-admin script to /usr/lib/ckan/default/bin

    Installed /usr/lib/ckan/default/src/ckan
Successfully installed ckan
Cleaning up...
(default)[ckan@localhost ~]$ pip install -r 
default/src/ckan/requirements.txt 
(...) 
Cleaning up... Command python setup.py egg_info failed with error code 1 in 
/usr/lib/ckan/default/build/funcsigs Storing complete log in 
/usr/lib/ckan/.pip/pip.log

Full pip.log

假设“成功安装ckan”应该有此命令（虚拟环境）

(default)[ckan@localhost ~]$ paster
-bash: paster: command not found

另一个信息：

• Python 2.7.5
  来自/usr/lib/python2.7/site-packages（python2.7）的

• pip 9.0.1

• 操作系统：Centos7 Linux localhost.localdomain 3.10.0-514.6.1.el7.x86_64＃1 SMP Wed 1月18日13:06:36 UTC 2017 x86_64 x86_64 x86_64 GNU / Linux

• Pip安装包（virtualenv）：

• appdirs（1.4.0）

• ckan（2.6.0，/ usr / lib / ckan / default / src / ckan）

• 包装（16.8）

• pip（1.4.1）

• pyparsing（2.1.10）

• setuptools（34.1.1）

• 六（1.10.0）

• wsgiref（0.1.2）