I have the following libc6 dependency problem in Debian 9.12 stretch.
sudo apt install libc6-dev
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: libc6-dev : Depends: libc6 (= 2.24-11+deb9u4) but 2.27-6 is to be installed Depends: libc-dev-bin (= 2.24-11+deb9u4) but it is not going to be installed E: Unable to correct problems, you have held broken packages. How can I fix it?
EDIT1: apt policy libc6
libc6: Installed: 2.27-6 Candidate: 2.27-6 Version table: *** 2.27-6 100 100 /var/lib/dpkg/status 2.24-11+deb9u4 500 500 http://deb.debian.org/debian stretch/main amd64 Packages 2.24-11+deb9u1 500 500 http://security.debian.org/debian-security stretch/updates/main amd64 Packages EDIT2:
sudo apt install libc6/stable libc6-bin/stable locales/stable Reading package lists... Done Building dependency tree Reading state information... Done E: Release 'stable' for 'libc6' was not found E: Unable to locate package libc6-bin E: Release 'stable' for 'locales' was not found 
