Try using reverse slashes in paths for Windows variables.
Try using reverse slashes in paths for Windows variables.

hsorby/libcellml,cellml/libcellml,cellml/libcellml,nickerso/libcellml,hsorby/libcellml,cellml/libcellml,nickerso/libcellml,cellml/libcellml,nickerso/libcellml,hsorby/libcellml,nickerso/libcellml,hsorby/libcellml