--- pycrypto/setup.py
+++ pycrypto/setup.py
@@ -94,13 +94,6 @@
             Extension("Crypto.Cipher.DES3",
                       include_dirs=['src/'],
                       sources=["src/DES3.c"]),
-            Extension("Crypto.Cipher.IDEA",
-                      include_dirs=['src/'],
-                      sources=["src/IDEA.c"],
-                      libraries=HTONS_LIBS),
-            Extension("Crypto.Cipher.RC5",
-                      include_dirs=['src/'],
-                      sources=["src/RC5.c"]),
 
             # Stream ciphers
             Extension("Crypto.Cipher.ARC4",
@@ -111,6 +104,17 @@
                       sources=["src/XOR.c"]),
             ]
 
+        if 0: #not os.environ.has_key("BINDIST") or os.environ["BINDIST"]!="1":
+            self.extensions += [
+                Extension("Crypto.Cipher.IDEA",
+                          include_dirs=['src/'],
+                          sources=["src/IDEA.c"],
+                          libraries=HTONS_LIBS),
+                Extension("Crypto.Cipher.RC5",
+                          include_dirs=['src/'],
+                          sources=["src/RC5.c"]),
+                ]
+
         # Detect which modules should be compiled
         self.detect_modules()
         build_ext.build_extensions(self)
--- pycrypto/Cipher/__init__.py
+++ pycrypto/Cipher/__init__.py
@@ -24,7 +24,7 @@
 """
 
 __all__ = ['AES', 'ARC2', 'ARC4',
-           'Blowfish', 'CAST', 'DES', 'DES3', 'IDEA', 'RC5',
+           'Blowfish', 'CAST', 'DES', 'DES3',
            'XOR'
            ]