I get this error while making the Orthanc package via github: Install ‘patch’ standard command-line tools’.
If I comment this out in the DownloadPackage.cmake file, even then the installation fails later on.
I also tried installation by downloading the pre-compiled package but that runs into error at Arithmetic check saying ‘Permission Denied’. I am not sure what to do.
I had no trouble installing Orthanc on Ubuntu 16.04. It is my first time doing an Arch Linux installation.