[oe] gstreamer not getting populated in file system

[harshada]

We created new image by adding following into minimal-image.bb:
             gstreamer \
             gst-plugins-base \
             gst-plugins-good \
             gst-plugins-bad \
             gst-plugins-ugly
Image is getting built without any compiling issues. But we are not able 
to find required
gstreamer plugins in the file system image. In ipk directory, we could 
find all of the corresponding ipks.
What to do to get the filesystem populated with these gstreamer plugins?

thanks and regards,
Harshada