I tried to build LXQt 0.7.0 from source in official download link  with compilation instructions in LxDE Wiki . There are some missing components in the download link. I had to downloaded them from git one by one. The missing components are listed below:
Among those packages, lxinput-qt is not in the official git server . I had to search it on Internet and clone it from PCMan's personal git-hub repository . I could not get it compiled at that time either.
 My compilation environment is Debian sid release. Currently I can compile and install LXQt with 0.7.0 tarballs mixed with source code from git except lxinput-qt.