libncurses5-dev and dpkg-dev missing on linux lite?

[bashcommando]

I would hate to mix repos again and crash my package manager, but is there a way to add those two packages without crashing my package manager? Here is my terminal:

bashcommando@Aspire-5720Z:~/Desktop/spearmint-kernel/linux-3.16.1$ sudo apt-get install gcc libncurses5-dev dpkg-dev
Reading package lists... Done
Building dependency tree     
Reading state information... Done
Package dpkg-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Unable to locate package libncurses5-dev
E: Package 'dpkg-dev' has no installation candidate

 

[arochester]

How did you mix repos? Linux Lite is based on Ubuntu 12.04 (LTS) and the packages are available through that. What is your sources list like now?