/usr/bin/ld: cannot find -lX11
collect2: ld returned 1 exit status
make[4]: *** [libgklayout.so] Error 1
make[4]: Leaving directory `/sources/firefox-build/layout/build'
make[3]: *** [libs] Error 2
make[3]: Leaving directory `/sources/firefox-build/layout'
make[2]: *** [tier_9] Error 2
make[2]: Leaving directory `/sources/firefox-build'
make[1]: *** [default] Error 2
make[1]: Leaving directory `/sources/firefox-build'
make: *** [build] Error 2