The PostGIS source tree on !GitLab (https://gitlab.com/postgis/postgis) is a [CodeMirrors mirror] of the Subversion repository (http://svn.osgeo.org/postgis/). To get the source from !GitLab, and start a configure: {{{ git clone https://gitlab.com/postgis/postgis.git cd postgis ./autogen.sh ./configure }}} To fork PostGIS to !GitLab to modify and test new features, follow the guideline [http://doc.gitlab.com/ee/workflow/forking_workflow.html Project Forking Workflow].