L([C II])/SFR(tot) as a function of the rest-frame Lyα equivalent width of the ALPINE sources and z ∼ 6 − 7 galaxies taken from the literature (pink symbols: circles for detections, and triangles for upper limits). The dotted line shows the fitting relation obtained by Harikane et al. (2018) for a compilation of z ∼ 5.7 − 7 galaxies, the horizontal line the average value from the local relation. The green lines/band show the fit to the data; the resulting slope is −0.11 ± 0.06, indicating a weak dependence on EW(Lyα).