root@raspberrypi:/home/pi# apt-get install libqtgui4
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  fontconfig fontconfig-config fonts-dejavu-core libaudio2 libavahi-client3 libcups2 libfontconfig1 libice6 libjbig0 libjpeg8 liblcms2-2 libmng1 libsm6
  libtiff5 libxrender1 libxt6 x11-common
Suggested packages:
  nas cups-common liblcms2-utils qt4-qtconfig
The following NEW packages will be installed:
  fontconfig fontconfig-config fonts-dejavu-core libaudio2 libavahi-client3 libcups2 libfontconfig1 libice6 libjbig0 libjpeg8 liblcms2-2 libmng1 libqtgui4
  libsm6 libtiff5 libxrender1 libxt6 x11-common
0 upgraded, 18 newly installed, 0 to remove and 0 not upgraded.
Need to get 253 kB/7,081 kB of archives.
After this operation, 18.2 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libcups2 armhf 1.7.5-11+deb8u1
  404  Not Found [IP: 193.35.52.51 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/c/cups/libcups2_1.7.5-11+deb8u1_armhf.deb  404  Not Found [IP: 193.35.52.51 80]

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?