Created attachment 763760 [details] all requested files * meson-log.txt Configure failed with the following error: subprojects/extensions-tool/src/templates/meson.build:7:2: ERROR: Function does not take positional arguments. In the attachment: build.log environment gnome-shell.pqv gnome-shell.info gnome-shell.out gnome-shell.workdir meson-log.txt I will file another bug for nm-applet with the same issue. Thank you for your help.
I think you need to emerge --sync. This was fixed already in bug 831921 (and new Meson is masked for now too). *** This bug has been marked as a duplicate of bug 831921 ***