trying to force exact requirements in the reqs.txt file while setup.py is a bit more loose.

Makefile

@@ -1,7 +1,7 @@
 # This file has been auto-generated.
 # All changes will be lost, see Projectfile.
 #
-# Updated at 2017-04-28 06:33:29.712011
+# Updated at 2017-04-30 10:12:39.793759
 
 PYTHON ?= $(shell which python)
 PYTHON_BASENAME ?= $(shell basename $(PYTHON))
@@ -10,7 +10,6 @@ PYTHON_REQUIREMENTS_DEV_FILE ?= requirements-dev.txt
 QUICK ?= 
 VIRTUAL_ENV ?= .virtualenv-$(PYTHON_BASENAME)
 PIP ?= $(VIRTUAL_ENV)/bin/pip
-PIP_INSTALL_OPTIONS ?= 
 PYTEST ?= $(VIRTUAL_ENV)/bin/pytest
 PYTEST_OPTIONS ?= --capture=no --cov=bonobo --cov-report html
 SPHINX_OPTS ?= 
@@ -25,13 +24,13 @@ YAPF_OPTIONS ?= -rip
 # Installs the local project dependencies.
 install: $(VIRTUAL_ENV)
 	if [ -z "$(QUICK)" ]; then \
-	    $(PIP) install -U pip wheel $(PIP_INSTALL_OPTIONS) -r $(PYTHON_REQUIREMENTS_FILE) ; \
+	    $(PIP) install -U pip wheel -r $(PYTHON_REQUIREMENTS_FILE) ; \
 	fi
 
 # Installs the local project dependencies, including development-only libraries.
 install-dev: $(VIRTUAL_ENV)
 	if [ -z "$(QUICK)" ]; then \
-	    $(PIP) install -U pip wheel $(PIP_INSTALL_OPTIONS) -r $(PYTHON_REQUIREMENTS_DEV_FILE) ; \
+	    $(PIP) install -U pip wheel -r $(PYTHON_REQUIREMENTS_DEV_FILE) ; \
 	fi
 
 # Cleans up the local mess.

Projectfile

@@ -20,12 +20,13 @@ enable_features = {
     'yapf',
 }
 
+# stricts deendencies in requirements.txt
 install_requires = [
-    'colorama ==0.3.9',
+    'colorama >=0.3,<1.0',
-    'fs ==2.0.3',
+    'fs >=2.0,<3.0',
-    'psutil ==5.2.2',
+    'psutil >=5.2,<6.0',
-    'requests ==2.13.0',
+    'requests >=2.0,<3.0',
-    'stevedore ==1.21.0',
+    'stevedore >=1.21,<2.0',
 ]
 
 extras_require = {

requirements.txt

@@ -1 +1,7 @@
 -e .
+
+colorama ==0.3.9
+fs ==2.0.3
+psutil ==5.2.2
+requests ==2.13.0
+stevedore ==1.21.0

setup.py

@@ -8,68 +8,59 @@ root_dir = os.path.dirname(os.path.abspath(__file__))
 
 tolines = lambda c: list(filter(None, map(lambda s: s.strip(), c.split('\n'))))
 
-
 def read(filename, flt=None):
     try:
         with open(filename) as f:
             content = f.read().strip()
             return flt(content) if callable(flt) else content
-    except EnvironmentError:
+    except FileNotFoundError:
         return ''
 
-
 # Py3 compatibility hacks, borrowed from IPython.
 try:
     execfile
 except NameError:
-
     def execfile(fname, globs, locs=None):
         locs = locs or globs
         exec(compile(open(fname).read(), fname, "exec"), globs, locs)
 
-
 version_ns = {}
-try:
+execfile(os.path.join(root_dir, 'bonobo/_version.py'), version_ns)
-    execfile(os.path.join(root_dir, 'bonobo/_version.py'), version_ns)
+version = version_ns.get('__version__', 'dev')
-except EnvironmentError:
-    version = 'dev'
-else:
-    version = version_ns.get('__version__', 'dev')
 
 setup(
-    name='bonobo',
+    name = 'bonobo',
-    description='Bonobo',
+    description = 'Bonobo',
-    license='Apache License, Version 2.0',
+    license = 'Apache License, Version 2.0',
-    install_requires=['colorama ==0.3.9', 'fs ==2.0.3', 'psutil ==5.2.2', 'requests ==2.13.0', 'stevedore ==1.21.0'],
+    install_requires = ['colorama >=0.3,<1.0',
-    version=version,
+ 'fs >=2.0,<3.0',
-    long_description=read('README.rst'),
+ 'psutil >=5.2,<6.0',
-    classifiers=read('classifiers.txt', tolines),
+ 'requests >=2.0,<3.0',
-    packages=find_packages(exclude=['ez_setup', 'example', 'test']),
+ 'stevedore >=1.21,<2.0'],
-    include_package_data=True,
+    version = version,
-    data_files=[
+    long_description = read('README.rst'),
-        (
+    classifiers = read('classifiers.txt', tolines),
-            'share/jupyter/nbextensions/bonobo-jupyter', [
+    packages = find_packages(exclude=['ez_setup', 'example', 'test']),
-                'bonobo/ext/jupyter/static/extension.js', 'bonobo/ext/jupyter/static/index.js',
+    include_package_data = True,
-                'bonobo/ext/jupyter/static/index.js.map'
+    data_files = [('share/jupyter/nbextensions/bonobo-jupyter',
-            ]
+  ['bonobo/ext/jupyter/static/extension.js',
-        )
+   'bonobo/ext/jupyter/static/index.js',
-    ],
+   'bonobo/ext/jupyter/static/index.js.map'])],
-    extras_require={
+    extras_require = {'dev': ['coverage >=4,<5',
-        'dev': [
+         'pylint >=1,<2',
-            'coverage >=4,<5', 'pylint >=1,<2', 'pytest >=3,<4', 'pytest-cov >=2,<3', 'pytest-timeout >=1,<2', 'sphinx',
+         'pytest >=3,<4',
-            'sphinx_rtd_theme', 'yapf'
+         'pytest-cov >=2,<3',
-        ],
+         'pytest-timeout >=1,<2',
-        'jupyter': ['jupyter >=1.0,<1.1', 'ipywidgets >=6.0.0.beta5']
+         'sphinx',
-    },
+         'sphinx_rtd_theme',
-    entry_points={
+         'yapf'],
-        'bonobo.commands': [
+ 'jupyter': ['jupyter >=1.0,<1.1', 'ipywidgets >=6.0.0.beta5']},
-            'init = bonobo.commands.init:register', 'run = bonobo.commands.run:register',
+    entry_points = {'bonobo.commands': ['init = bonobo.commands.init:register',
-            'version = bonobo.commands.version:register'
+                     'run = bonobo.commands.run:register',
-        ],
+                     'version = bonobo.commands.version:register'],
-        'console_scripts': ['bonobo = bonobo.commands:entrypoint'],
+ 'console_scripts': ['bonobo = bonobo.commands:entrypoint'],
-        'edgy.project.features': ['bonobo = '
+ 'edgy.project.features': ['bonobo = '
-                                  'bonobo.ext.edgy.project.feature:BonoboFeature']
+                           'bonobo.ext.edgy.project.feature:BonoboFeature']},
-    },
+    url = 'https://www.bonobo-project.org/',
-    url='https://www.bonobo-project.org/',
+    download_url = 'https://github.com/python-bonobo/bonobo/tarball/{version}'.format(version=version),
-    download_url='https://github.com/python-bonobo/bonobo/tarball/{version}'.format(version=version),
 )