Hi *, i have trouble to install calendar server. It stops during the develop run at the following step. Any help will be appreciated. Running setup.py install for cryptography . . . . building '_openssl' extension creating build/temp.linux-x86_64-2.7/build creating build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7 x86_64-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -I/usr/local/calendarserver/.develop/roots/PostgreSQL/include -I/usr/local/calendarserver/.develop/roots/memcached/include -I/usr/local/calendarserver/.develop/roots/libevent/include -fPIC -I/usr/include/python2.7 -c build/temp.linux-x86_64-2.7/_openssl.c -o build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7/_openssl.o build/temp.linux-x86_64-2.7/_openssl.c:695:6: error: conflicting types for ‘BIO_new_mem_buf’ BIO *BIO_new_mem_buf(void *, int); ^ In file included from /usr/include/openssl/asn1.h:65:0, from build/temp.linux-x86_64-2.7/_openssl.c:411: /usr/include/openssl/bio.h:692:6: note: previous declaration of ‘BIO_new_mem_buf’ was here BIO *BIO_new_mem_buf(const void *buf, int len); ^ build/temp.linux-x86_64-2.7/_openssl.c:2074:15: error: ‘SSLv2_method’ redeclared as different kind of symbol SSL_METHOD* (*SSLv2_method)(void) = NULL; ^ In file included from build/temp.linux-x86_64-2.7/_openssl.c:497:0: /usr/include/openssl/ssl.h:2349:19: note: previous declaration of ‘SSLv2_method’ was here const SSL_METHOD *SSLv2_method(void); /* SSLv2 */ ^ build/temp.linux-x86_64-2.7/_openssl.c:2075:15: error: ‘SSLv2_client_method’ redeclared as different kind of symbol SSL_METHOD* (*SSLv2_client_method)(void) = NULL; ^ In file included from build/temp.linux-x86_64-2.7/_openssl.c:497:0: /usr/include/openssl/ssl.h:2351:19: note: previous declaration of ‘SSLv2_client_method’ was here const SSL_METHOD *SSLv2_client_method(void); /* SSLv2 */ ^ build/temp.linux-x86_64-2.7/_openssl.c:2076:15: error: ‘SSLv2_server_method’ redeclared as different kind of symbol SSL_METHOD* (*SSLv2_server_method)(void) = NULL; ^ In file included from build/temp.linux-x86_64-2.7/_openssl.c:497:0: /usr/include/openssl/ssl.h:2350:19: note: previous declaration of ‘SSLv2_server_method’ was here const SSL_METHOD *SSLv2_server_method(void); /* SSLv2 */ ^ error: command 'x86_64-linux-gnu-gcc' failed with exit status 1 ---------------------------------------- Command "/usr/local/calendarserver/.develop/virtualenv/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-KDKDTa/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-A_4ATy-record/install-record.txt --single-version-externally-managed --compile --install-headers /usr/local/calendarserver/.develop/virtualenv/include/site/python2.7/cryptography" failed with error code 1 in /tmp/pip-build-KDKDTa/cryptography