raise a decent error if pypy <2.6 + update README

2 files changed, 10 insertions, 1 deletions

diff --git a/README.rst b/README.rst
index 0f4fc33..5f735b2 100644
--- a/README.rst
+++ b/README.rst
@@ -105,7 +105,7 @@ Compatibility
 -------------
 
 This library should be compatible with py-bcrypt and it will run on Python
-2.6+, 3.3+, and PyPy.
+2.6+, 3.3+, and PyPy 2.6+.
 
 Security
 --------
diff --git a/setup.py b/setup.py
index fa82e91..060e675 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+import platform
 import sys
 from distutils.command.build import build
 
@@ -22,6 +23,14 @@ with open("src/bcrypt/__about__.py") as fp:
     exec(fp.read(), __about__)
 
 
+if platform.python_implementation() == "PyPy":
+    if sys.pypy_version_info < (2, 6):
+        raise RuntimeError(
+            "bcrypt is not compatible with PyPy < 2.6. Please upgrade PyPy to "
+            "use this library."
+        )
+
+
 class PyTest(test):
     def finalize_options(self):
         test.finalize_options(self)