From SOFAWiki

Qmake issues

The project is defined using the qmake system based on .pro and .prf files. qmake is used to generate the system-specific project files (Makefile for unix systems, Visual C++ for Windows). The following issues have been encountered:

• Folder names: qmake may fail in case of spaces in the folder names, such as "My Documents" .
• Links: Linked folders may result in wrong relative paths upward in the file hierarchy, so avoid links, especially to plugin directories.