diff --git a/.travis.yml b/.travis.yml
index 72e7664..06a02d6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,9 +17,7 @@ python:
 - 2.7
 install:
 - travis_retry pip install -U pip
-- travis_retry pip install --no-binary keystone-engine keystone-engine
-- travis_retry pip install coverage
-- travis_retry pip install --no-binary capstone .
+- travis_retry pip install --no-binary capstone --no-binary keystone-engine .[dev]  # cs/ks can have pip install issues (cs issues #445)
 - scripts/travis_install_z3.sh
 - scripts/travis_install_unicorn.sh 
 script:
diff --git a/README.md b/README.md
index bf756c6..e3118c1 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ enclosed `z3` binary in your `$PATH`.
 > Note: Due to a known [issue](https://github.com/aquynh/capstone/issues/445),
   Capstone may not install correctly. If you get this error message,
   "ImportError: ERROR: fail to load the dynamic library.", or another related
-  to Capstone, try reinstalling via `pip install -I --no-binary capstone`
+  to Capstone, try reinstalling via `pip install -I --no-binary capstone capstone`
 
 ### for developers
 
@@ -83,9 +83,9 @@ After installing Manticore, here is some basic usage you can try.
 ```
 cd examples/linux
 make
-manticore basic  # a pse_* directory is created
-cat pse_*/*1.stdin | ./basic
-cat pse_*/*2.stdin | ./basic
+manticore basic  # a mcore_* directory is created
+cat mcore_*/*1.stdin | ./basic
+cat mcore_*/*2.stdin | ./basic
 
 cd ../script
 python count_instructions.py ../linux/helloworld
diff --git a/setup.py b/setup.py
index aceab22..cb5af00 100644
--- a/setup.py
+++ b/setup.py
@@ -7,8 +7,15 @@ setup(
     install_requires=[
         'capstone',
         'pyelftools',
-        'unicorn'
+        'unicorn',
     ],
+    extras_require={
+        'dev': [
+            'keystone-engine',
+            'coverage',
+            'nose',
+        ]
+    },
     entry_points={
         'console_scripts': [
             'manticore = manticore.__main__:main'