我一直在尝试安装 psycopg2 以在 virtualenv 中使用。我设法发现它取决于libpq-dev（因为 pip 给我一个Error: pg_config executable not found.错误）可以使用apt-get install libpq-dev.
但是，我所有的安装尝试libpq-dev都导致了以下错误：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
libpq-dev : Depends: libkrb5-dev but it is not going to be installed
E: Broken packages
谁能解决这个问题？
来源.list
# deb cdrom:[Debian GNU/Linux 6.0.1a _Squeeze_ - Official amd64 NETINST Binary-1 20110320-15:00]/ squeeze main
#deb cdrom:[Debian GNU/Linux 6.0.1a _Squeeze_ - Official amd64 NETINST Binary-1 20110320-15:00]/ squeeze main
deb http://ftp.us.debian.org/debian/ squeeze main
deb-src http://ftp.us.debian.org/debian/ squeeze main
deb http://security.debian.org/ squeeze/updates main
deb-src http://security.debian.org/ squeeze/updates main
# squeeze-updates, previously known as 'volatile'
deb http://ftp.us.debian.org/debian/ squeeze-updates main
deb-src http://ftp.us.debian.org/debian/ squeeze-updates main
# Backports repository
deb http://backports.debian.org/debian-backports squeeze-backports main contrib non-free
# RabitMq
deb http://www.rabbitmq.com/debian/ testing main