configure problem

i have a problem with configure openwebrtc project. When i execute configure i have error:

checking for GSTREAMER_SCTP... no
configure: error: Package requirements (gstreamer-sctp-1.0) were not met:

No package 'gstreamer-sctp-1.0' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables GSTREAMER_SCTP_CFLAGS
and GSTREAMER_SCTP_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

I build openwebrtc on debian jessie from armbian and i don't have idea how install gstreamer-sctp-1.0. On the other side, when i followed by the building guide i have following error

WARNING: Running as root
WARNING: Error importing command bundlesource:
No module named setuptools.sandbox
WARNING: Using default configuration because /root/.cerbero/cerbero.cbc is missing
WARNING: Could not recover status
WARNING: Error loading recipe in file /root/cerbero/recipes/openssl.recipe
***** Error running 'fetch-package' command:
Recipe 'openssl' not found

Start by reproducing the configure failure on Debian Jessie and compare the missing gstreamer-sctp-1.0 check with the build guide. Then inspect the Cerbero command-bundle warnings, /root/cerbero/recipes/openssl.recipe, and the reported setuptools.sandbox error. Done means the documented build path and configure step complete without these errors.

Written by the indexing model from the issue text.