$ cat /etc/apt/sources.list.d/openmodelica.list 
deb http://build.openmodelica.org/apt bionic nightly
deb-src http://build.openmodelica.org/apt bionic nightly

$ sudo apt install openmodelica
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  clang drcontrol drmodelica gdal-data libarmadillo8 libavdevice57 libcoin80v5 libdap25 libdapclient6v5 libepsilon1 libfreexl1 libfyba0 libgdal20 libgeos-3.6.2 libgeos-c1v5 libgeotiff2 libhdf4-0-alt libkmlbase1 libkmldom1 libkmlengine1
  libnetcdf13 libogdi3.2 libomc libomcsimulation libomniorb4-2 libomnithread4 libomplot libomsimulator libopenscenegraph100v5 libopenthreads20 libpq5 libproj12 libsaxonb-java libspatialite7 libsuperlu5 liburiparser1 libxine2 libxine2-bin
  libxine2-doc libxine2-ffmpeg libxine2-misc-plugins libxine2-plugins odbcinst odbcinst1debian2 omc omc-common omedit omlib-complex-3.2.2 omlib-modelica-3.2.2 omlib-modelicareference omlib-modelicaservices-3.2.2 omnotebook omplot omshell
  omshell-terminal proj-bin proj-data
Suggested packages:
  libopenal0a libsimage-dev geotiff-bin gdal-bin libgeotiff-epsg libhdf4-doc libhdf4-alt-dev hdf4-tools ogdi-bin libsaxonb-java-doc gxine xine-ui python-beautifulsoup
The following NEW packages will be installed:
  clang drcontrol drmodelica gdal-data libarmadillo8 libavdevice57 libcoin80v5 libdap25 libdapclient6v5 libepsilon1 libfreexl1 libfyba0 libgdal20 libgeos-3.6.2 libgeos-c1v5 libgeotiff2 libhdf4-0-alt libkmlbase1 libkmldom1 libkmlengine1
  libnetcdf13 libogdi3.2 libomc libomcsimulation libomniorb4-2 libomnithread4 libomplot libomsimulator libopenscenegraph100v5 libopenthreads20 libpq5 libproj12 libsaxonb-java libspatialite7 libsuperlu5 liburiparser1 libxine2 libxine2-bin
  libxine2-doc libxine2-ffmpeg libxine2-misc-plugins libxine2-plugins odbcinst odbcinst1debian2 omc omc-common omedit omlib-complex-3.2.2 omlib-modelica-3.2.2 omlib-modelicareference omlib-modelicaservices-3.2.2 omnotebook omplot omshell
  omshell-terminal openmodelica proj-bin proj-data