However, I have Qt correctly configured on my machine, and selected the correct Qt directory while installing Squish.
|Using Squish with Qt debug libraries|
The prebuilt binary packages are built against release versions of the Qt libraries—not against the debug versions. If you want to use Squish with Qt debug libraries you will need to build Squish from source. (See Installation for Testing Pure Qt 4 Applications (Section 18.104.22.168).)