I'm trying to build my Qt application: https://garage.maemo.org/builder/fremantle/midij_0.1-4/

I need GStreamer to be included in the project but an error keeps appearing:
Package gstreamer-0.10 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gstreamer-0.10.pc'
to the PKG_CONFIG_PATH environment variable

I'm using PKGCONFIG += gstreamer-0.10 to add the references to GStreamer, but something is missing.

I've already tried:
- PKGCONFIG += gstreamer-app-0.10
- INCLUDEPARH += /usr/include/gstreamer-0.10 ...

Please help!