add grackle

.gitlab-ci.yml

@@ -28,7 +28,7 @@ before_script:
   - cd ..
 
 # compile pyswiftsim
-  - python3 setup.py install --with-swift $LHOME/swiftsim --user
+  - python3 setup.py install --with-swift $LHOME/swiftsim --with-grackle $GRACKLE_ROOT --user
 
 # compile the docs
   - cd docs