A minha parece estar alinhada. Sugiro que suas listas de pacotes locais precisem ser atualizadas com um sudo apt-get update
.
Se isso não ajudar, adicione a saída de apt-cache policy libxml2{,-dev}
à sua pergunta, por favor.
$ apt-cache policy libxml2{,-dev}
libxml2:
Installed: 2.9.1+dfsg1-3ubuntu4.4
Candidate: 2.9.1+dfsg1-3ubuntu4.4
Version table:
*** 2.9.1+dfsg1-3ubuntu4.4 0
500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
100 /var/lib/dpkg/status
2.9.1+dfsg1-3ubuntu4 0
500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
libxml2-dev:
Installed: 2.9.1+dfsg1-3ubuntu4.4
Candidate: 2.9.1+dfsg1-3ubuntu4.4
Version table:
*** 2.9.1+dfsg1-3ubuntu4.4 0
500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
100 /var/lib/dpkg/status
2.9.1+dfsg1-3ubuntu4 0
500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages