Hi,

For several weeks I'm trying to solve dependency issues with curl, but 
I'm lost.. any idea?

emerge --keep-going -upND world

These are the packages that would be merged, in order:

Calculating dependencies... done!

emerge: there are no ebuilds built with USE flags to satisfy 
"net-misc/curl[ssl,curl_ssl_nss]".
!!! One of the following packages is required to complete your request:
- net-misc/curl-7.25.0-r1::gentoo (Change USE: +curl_ssl_nss, this 
change violates use flag constraints defined by net-misc/curl-7.25.0-r1: 
'threads? ( !ares ) ssl? ( exactly-one-of ( curl_ssl_axtls 
curl_ssl_cyassl curl_ssl_gnutls curl_ssl_openssl curl_ssl_nss 
curl_ssl_polarssl ) )')
(dependency required by "net-libs/liboauth-0.9.6[curl,nss]" [installed])
(dependency required by 
"gnome-extra/evolution-data-server-3.2.3-r1[gnome-online-accounts]" 
[installed])
(dependency required by "gnome-extra/gnome-contacts-3.2.2" [installed])
(dependency required by "@selected" [set])
(dependency required by "@world" [argument])

----

[I] net-misc/curl
      Available versions:  7.21.4 (~)7.21.6 (~)7.21.7 (~)7.21.7-r2 
(~)7.22.0 (~)7.23.1 7.24.0 (~)7.25.0 (~)7.25.0-r1 {ares curl_ssl_axtls 
curl_ssl_cyassl curl_ssl_gnutls curl_ssl_nss +curl_ssl_openssl 
curl_ssl_polarssl gnutls idn ipv6 kerberos ldap nss ssh ssl static-libs 
test threads}
      Installed versions:  7.25.0-r1(12.34.47 
2012-05-14)(curl_ssl_openssl idn ipv6 ldap ssh ssl threads -ares 
-curl_ssl_axtls -curl_ssl_cyassl -curl_ssl_gnutls -curl_ssl_nss 
-curl_ssl_polarssl -kerberos -static-libs -test)
      Homepage:            http://curl.haxx.se/
      Description:         A Client that groks URLs

-------

Thank you
L: