apt-get install libx11-dev
Reading package lists... Done
Building dependency tree... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
  libgtk2.0-dev: Depends: libglib2.0-dev (>= 2.4.1-2) but it is not going to be installed
                 Depends: libpango1.0-dev (>= 1.4.0-3) but it is not going to be installed
                 Depends: libatk1.0-dev (>= 1.6.1-2) but it is not going to be installed
                 Depends: libxext-dev but it is not going to be installed or
                          xlibs-dev but it is not going to be installed
  libx11-dev: Depends: libx11-6 (= 6.8.2.dfsg.1-10) but 4.3.0.dfsg.1-14 is to be installed
              Depends: libxext-dev but it is not going to be installed
              Depends: libxi-dev but it is not going to be installed
              Depends: x-dev but it is not going to be installed
              Depends: libxkbfile-dev but it is not going to be installed