Either install QtCreator or a compiler (build-essential package on Linux), make, qttools5-dev-tools and libqt5xmlpatterns5-dev. Then uncompress this archive, run "ccmake .", follow the instructions, then "make" to build Inishell. You need to have MeteoIO and Snowpack and/or Alpine3D on your system to make use of them.
More details are given in the README.md file at the root of the archiveas well as at https://models.slf.ch/p/meteoio/page/Compiling-MeteoIO/