PR#276 Travis CI checks failed due to an issue with the slycot builds. SeeTravis CI build 400.01, line 954. I did a quick check and it looks like there is a problem withskbuild:

Traceback (most recent call last):  File "setup.py", line 8, in <module>    from skbuild import setupModuleNotFoundError: No module named 'skbuild'0.03s$ if [ $SLYCOT != "" ]; then python -c "import slycot"; fi

Not sure if this is something transient or something that has changed inscikit (and not quite sure whyslycot needsscikit).