list prereqs.

See https://caremad.io/posts/2013/07/setup-vs-requirement/ .

.appveyor.yml

@@ -8,7 +8,7 @@ install:
     - choco install strawberryperl
     - copy %PYTHON%\python.exe %PYTHON%\python3.exe
     - SET PATH=%PYTHON%;C:\strawberry\c\bin;C:\strawberry\perl\site\bin;C:\strawberry\perl\bin;%PATH%
-    - python3 -mpip install Pillow attrs configobj flake8 flake8-import-order py2exe pycotap pygame pysol-cards random2 six
+    - python3 -mpip install Pillow attrs configobj flake8 flake8-import-order py2exe pycotap pygame pysol-cards random2 setuptools six
     - perl -v
     - copy C:\msys64\mingw64\bin\mingw32-make.exe C:\msys64\mingw64\bin\make.exe
     - SET PATH=C:\strawberry\c\bin;C:\strawberry\perl\site\bin;C:\strawberry\perl\bin;%PATH%

.travis.yml

@@ -39,7 +39,7 @@ before_install:
 install:
     - sudo cpanm --notest Capture::Tiny
     - sudo cpanm Code::TidyAll::Plugin::Flake8 Perl::Tidy Test::Code::TidyAll Test::Differences Test::TrailingSpace
-    - export PY_MODS='attrs configobj pycotap pysol-cards random2 six'
+    - export PY_MODS='attrs configobj pycotap pysol-cards random2 setuptools six'
     - "`which python3` -m pip install --upgrade flake8 flake8-import-order $PY_MODS"
     - "sudo /usr/bin/python3 -m pip install --upgrade $PY_MODS || true"
     - "sudo `which python2` -m pip install --upgrade $PY_MODS"

setup.py

@@ -2,11 +2,13 @@
 # -*- mode: python; -*-
 
 import os
-from distutils.core import setup
 from glob import glob
 
 from pysollib.settings import PACKAGE_URL
 from pysollib.settings import VERSION
+
+from setuptools import setup
+
 if os.name == 'nt':
     import py2exe  # noqa: F401
 
@@ -69,6 +71,14 @@ kw = {
     'author': 'Skomoroh',
     'author_email': 'skomoroh@gmail.com',
     'description': 'a Python solitaire game collection',
+    'install_requires': [
+        'attrs',
+        'configobj',
+        'pycotap',
+        'pysol_cards',
+        'random2',
+        'six',
+    ],
     'long_description': long_description,
     'license': 'GPL',
     'scripts': ['pysol.py'],