make error

[drove]

objs/addon/src/ngx_http_encrypted_session_module.o:(.data+0x0): multiple definition of 'ngx_http_encrypted_session_module'
objs/addon/src/ngx_http_encrypted_session_module.o:(.data+0x0): first defined here
objs/addon/src/ngx_http_encrypted_session_cipher.o: In function 'ngx_http_encrypted_session_aes_mac_encrypt':
/opt/encrypted-session-nginx-module-0.08/src/ngx_http_encrypted_session_cipher.c:29: multiple definition of `ngx_http_encrypted_session_aes_mac_encrypt'
objs/addon/src/ngx_http_encrypted_session_cipher.o:/opt/encrypted-session-nginx-module-0.08/src/ngx_http_encrypted_session_cipher.c:29: first defined here
objs/addon/src/ngx_http_encrypted_session_cipher.o: In function 'ngx_http_encrypted_session_aes_mac_decrypt':
/opt/encrypted-session-nginx-module-0.08/src/ngx_http_encrypted_session_cipher.c:143: multiple definition of 'ngx_http_encrypted_session_aes_mac_decrypt'
objs/addon/src/ngx_http_encrypted_session_cipher.o:/opt/encrypted-session-nginx-module-0.08/src/ngx_http_encrypted_session_cipher.c:143: first defined here

openresty-1.13.6.2