diff --git a/.dockerignore b/.dockerignore
index 7b17aac..76d2dd6 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -3,7 +3,6 @@
 !tests/
 !.coveragerc
 !.noserc
-!MANIFEST.in
 !README.rst
 !requirements*.pip
 !setup.py
diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index 80bda99..0000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1,3 +0,0 @@
-include requirements.pip
-include requirements-py2.pip
-include requirements-py3.pip
diff --git a/README.rst b/README.rst
index 876b75c..89e2635 100644
--- a/README.rst
+++ b/README.rst
@@ -91,7 +91,7 @@ manager. For example, on Ubuntu, you can use apt-get:
 
     sudo apt-get install libdb++-dev
     export BERKELEYDB_DIR=/usr
-    pip install -r requirements-py3.pip
+    pip install .
 
 MacOS
 *****
@@ -101,7 +101,7 @@ On Mac, you can install BSD-DB using `homebrew <https://homebrew.sh/>`_:
 .. sourcecode :: sh
 
     brew install berkeley-db4
-    pip install -r requirements-py3.pip
+    pip install .
 
 Windows
 *******
@@ -117,6 +117,7 @@ After you download the wheel, install it and you're good to go:
 .. sourcecode :: bash
 
     pip install bsddb3‑6.2.1‑cp35‑cp35m‑win_amd64.whl
+    pip install .
 
 License conflicts
 *****************
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index f2981d9..79f5228 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -2,22 +2,42 @@ trigger:
 - master
 
 pool:
-  vmImage: 'windows-latest'
+  vmImage: '$(os.image)'
 
 strategy:
   matrix:
-    Python27:
+    Windows-Python27:
       python.version.major: '2'
       python.version.minor: '7'
-    Python35:
+      os.image: 'windows-latest'
+    Windows-Python35:
       python.version.major: '3'
       python.version.minor: '5'
-    Python36:
+      os.image: 'windows-latest'
+    Windows-Python36:
       python.version.major: '3'
       python.version.minor: '6'
-    Python37:
+      os.image: 'windows-latest'
+    Windows-Python37:
       python.version.major: '3'
       python.version.minor: '7'
+      os.image: 'windows-latest'
+    MacOS-Python27:
+      python.version.major: '2'
+      python.version.minor: '7'
+      os.image: 'macOS-latest'
+    MacOS-Python35:
+      python.version.major: '3'
+      python.version.minor: '5'
+      os.image: 'macOS-latest'
+    MacOS-Python36:
+      python.version.major: '3'
+      python.version.minor: '6'
+      os.image: 'macOS-latest'
+    MacOS-Python37:
+      python.version.major: '3'
+      python.version.minor: '7'
+      os.image: 'macOS-latest'
 
 steps:
 - task: UsePythonVersion@0
@@ -34,9 +54,14 @@ steps:
     $wheel = "bsddb3-6.2.6-cp3$(python.version.minor)-cp3$(python.version.minor)m-win_amd64.whl"
     Invoke-WebRequest -Uri "$mirror/$wheel" -OutFile "$(Agent.TempDirectory)\$wheel"
     pip install "$(Agent.TempDirectory)\$wheel"
-  condition: eq(variables['python.version.major'], '3')
+  condition: and(eq(variables['python.version.major'], '3'), eq(variables['os.image'], 'windows-latest'))
   displayName: 'Install bsddb3 wheel'
 
+- script: |
+    brew install berkeley-db4
+  condition: eq(variables['os.image'], 'macOS-latest')
+  displayName: 'Install bsddb3 dependencies'
+
 - script: |
     pip install -r requirements-dev.pip
     pip install .
diff --git a/requirements-py2.pip b/requirements-py2.pip
deleted file mode 100644
index 8fcb6a6..0000000
--- a/requirements-py2.pip
+++ /dev/null
@@ -1 +0,0 @@
-functools32>=3.2.3-2
diff --git a/requirements-py3.pip b/requirements-py3.pip
deleted file mode 100644
index 1b97276..0000000
--- a/requirements-py3.pip
+++ /dev/null
@@ -1 +0,0 @@
-bsddb3>=6.1.0
diff --git a/requirements.pip b/requirements.pip
deleted file mode 100644
index f0d6c51..0000000
--- a/requirements.pip
+++ /dev/null
@@ -1,7 +0,0 @@
-future>=0.15.2
-rdflib>=4.2.0
-requests>=2.5.1
-six>=1.10.0
-setuptools>=18.5
-rdflib-sqlalchemy>=0.3.8
-SPARQLWrapper>=1.8.2
diff --git a/setup.py b/setup.py
index e6c329b..feb57e7 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 """Library installer."""
 
 from __future__ import absolute_import, unicode_literals
-from os.path import isfile
+from platform import system
 from sys import version_info
 import codecs
 
@@ -9,34 +9,25 @@
 from setuptools import setup
 
 
-def requirements_for(version=None):
-    suffix = '-py%s' % version if version is not None else ''
-    pip_path = 'requirements%s.pip' % suffix
-
-    if not isfile(pip_path):
-        return set(), set()
-
-    requirements = set()
-    links = set()
-    with open(pip_path) as pip_file:
-        for line in pip_file:
-            line = line.strip()
-            if '#egg=' in line:
-                requirement_parts = line.split('#egg=')[-1].split('-')
-                version = requirement_parts[-1]
-                library = '-'.join(requirement_parts[:-1])
-                requirement = '{}=={}'.format(library, version)
-                requirements.add(requirement)
-                links.add(line)
-            else:
-                requirements.add(line)
-    return requirements, links
+install_requires = [
+    'future>=0.15.2',
+    'rdflib>=4.2.0',
+    'requests>=2.5.1',
+    'six>=1.10.0',
+    'setuptools>=18.5',
+    'rdflib-sqlalchemy>=0.3.8',
+    'SPARQLWrapper>=1.8.2',
+]
 
+if version_info.major == 2:
+    install_requires.extend([
+        'functools32>=3.2.3-2',
+    ])
 
-requirements_general, links_general = requirements_for()
-requirements_version, links_version = requirements_for(version_info.major)
-install_requires = requirements_general | requirements_version
-dependency_links = links_general | links_version
+if version_info.major == 3 or system() == 'Darwin':
+    install_requires.extend([
+        'bsddb3>=6.1.0',
+    ])
 
 with codecs.open('README.rst', encoding='utf-8') as fobj:
     long_description = fobj.read()
@@ -52,7 +43,6 @@ def requirements_for(version=None):
     license='Apache Software License',
     description='Library to interface with Project Gutenberg',
     long_description=long_description,
-    dependency_links=dependency_links,
     install_requires=sorted(install_requires),
     python_requires='>=2.7.*,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*',
     classifiers=[