ssh2 build on windows

I'm trying to build the ssh2 extension for PHP 5.4 on Windows: configure --disable-all --enable-cli --with-openssl=shared --with-ssh2=shared C:\Utils\PHP-sdk\php-5.4\vc9\x86\php-5.4.10>nmake Microsoft (R) Program Maintenance Utility Version 9.00.21022.08 Copyright (C) Microsoft Corporation. All rights reserved. Recreating build dirs Recreating build dirs Recreating build dirs Creating library Release_TS\php5ts.lib and object Release_TS\php5ts.exp Creating library Release_TS\php_openssl.lib and object Release_TS\php_openssl.exp EXT openssl build complete Creating library Release_TS\php_ssh2.lib and object Release_TS\php_ssh2.exp libssh2_a.lib(kex.obj) : error LNK2019: unresolved external symbol _BN_CTX_free referenced in function _diffie_hellman_sha1 libssh2_a.lib(kex.obj) : error LNK2019: unresolved external symbol _BN_clear_free referenced in function _diffie_hellman_sha1 libssh2_a.lib(openssl.obj) : error LNK2001: unresolved external symbol _BN_clear_free libssh2_a.lib(kex.obj) : error LNK2019: unresolved external symbol _BN_bin2bn referenced in function _diffie_hellman_sha1 ... Any ideas what I can do here? I'm using this dependency: http://windows.php.net/downloads/php-sdk/deps/libssh2-1.4.2-vc9-x86.zip<http://windows.php.net/downloads/php-sdk/deps/libssh2-1.4.2-vc9-x86.zip>