diff --git a/bin/setup.py.in b/bin/setup.py.in
index 1bcb41f..0341eaf 100644
--- a/bin/setup.py.in
+++ b/bin/setup.py.in
@@ -30,7 +30,7 @@ setuptools.setup(
     author_email="peter@trailofbits.com",
     license="Apache-2.0",
     keywords="tdd testing symbolic execution",
-    install_requires=['angr', 'manticore'],
+    install_requires=["angr ; sys_platform != 'darwin'", "manticore ; sys_platform != 'darwin'"],
     entry_points={
         'console_scripts': [
             'deepstate = deepstate.main_manticore:main',