- libextractor >= 0.6.1
- libmicrohttpd >= 0.9.31
- libgcrypt >= 1.2
-- libcurl >= 7.21.3
+- libgnurl >= 7.33.0 (available from https://gnunet.org/gnurl)
- libunistring >= 0.9.2
-- gnutls >= 2.12.0
+- gnutls >= 3.2.5
- libidn >= 1.0
- libglpk >= 4.45
- openssl >= 1.0 (binary, used to generate X.509 certificate)