diff --git a/Makefile b/Makefile
index 61eb028c..4764cba1 100644
--- a/Makefile
+++ b/Makefile
@@ -36,7 +36,7 @@ build: clean cythonize
 	python setup.py build_ext --inplace
 
 install: uninstall clean cythonize
-	pip install . -v
+	pip install -ve .
 
 uninstall:
 	- pip uninstall -y -q dependency-injector 2> /dev/null
diff --git a/setup.py b/setup.py
index cb684564..f6ddec9c 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,6 @@ from setuptools import setup, Extension
 
 # Defining setup variables:
 defined_macros = list()
-package_data = dict([('dependency_injector', ['*.pxd'])])
 
 # Getting description:
 with open('README.rst') as readme_file:
@@ -27,9 +26,6 @@ if os.environ.get('DEPENDENCY_INJECTOR_DEBUG_MODE') == '1':
     defined_macros.append(('CYTHON_TRACE', 1))
     defined_macros.append(('CYTHON_TRACE_NOGIL', 1))
 
-    package_data['dependency_injector'].append('*.pyx')
-    package_data['dependency_injector'].append('*.c')
-
 
 setup(name='dependency-injector',
       version=version,
@@ -55,7 +51,9 @@ setup(name='dependency-injector',
                     define_macros=defined_macros,
                     extra_compile_args=['-O2']),
       ],
-      package_data=package_data,
+      package_data={
+          'dependency_injector': ['*.pxd'],
+      },
       zip_safe=True,
       license='BSD New',
       platforms=['any'],
diff --git a/tox.ini b/tox.ini
index b52fc2e7..2cc5f30d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,8 +9,9 @@ commands=
     unit2 discover tests/unit
 
 [testenv:coveralls]
-basepython=python3.5
 passenv=TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH DEPENDENCY_INJECTOR_DEBUG_MODE
+basepython=python3.5
+usedevelop=True
 deps=
     {[testenv]deps}
     cython
@@ -19,6 +20,7 @@ deps=
 commands=
     coverage erase
     coverage run --rcfile=./.coveragerc -m unittest2 discover tests/unit
+    coverage report --rcfile=./.coveragerc
     coveralls
 
 [testenv:pylint]