Third, since you are having fun:
# dpkg -S gst-inspect
gstreamer-editor: /usr/bin/gst-inspect-gui
gstreamer0.8-tools: /usr/share/man/man1/gst-inspect-0.8.1.gz
gstreamer0.8-tools: /usr/bin/gst-inspect-0.8
gstreamer-editor: /usr/share/man/man1/gst-inspect-gui.1.gz
gstreamer-editor: /usr/share/applications/gst-inspect.desktop
gstreamer-editor: /usr/share/pixmaps/gst-inspect.png
dontlook:/home/habeeb/Desktop/banshee-0.10.12# gst-inspect
bash: gst-inspect: command not found
dontlook:/home/habeeb/Desktop/banshee-0.10.12# su habeeb
habeeb@dontlook:~/Desktop/banshee-0.10.12$ gst-inspect
bash: gst-inspect: command not found
./configure:
checking for gst-inspect... no
configure: error: Cannot find required gst-inspect tool.