Without this, it will fail finding all headers.
--nsversion=@GST_MAJORMINOR@ \
--strip-prefix=Gst \
-I$(top_srcdir) \
+ -I$(top_srcdir)/libs \
$(gir_cincludes) \
--add-include-path=$(top_builddir)/gst \
--library=libgstbase-0.10.la \
--nsversion=@GST_MAJORMINOR@ \
--strip-prefix=Gst \
-I$(top_srcdir) \
+ -I$(top_srcdir)/libs \
$(gir_cincludes) \
--add-include-path=$(top_builddir)/gst \
--library=libgstcheck-0.10.la \
--strip-prefix=Gst \
--nsversion=@GST_MAJORMINOR@ \
-I$(top_srcdir) \
+ -I$(top_srcdir)/libs \
$(gir_cincludes) \
--add-include-path=$(top_builddir)/gst \
--library=libgstnet-0.10.la \