Unpacking replacement libc6 ...
dpkg: error processing /var/cache/apt/archives/libc6_2.7-4_amd64.deb (--unpack):
 trying to overwrite `/usr/lib64', which is also in package nspluginwrapper
Errors were encountered while processing:
 /var/cache/apt/archives/libc6_2.7-4_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)