Seems that the package glib2-2.80.4-bootstrap.tgz is missing in both 7.6/amd64 and -current.
Indirectly Gimp depends on it. glib2-2.80.4-bootstrap.tgz | +-> gobject-introspection-1.80.1p1.tgz | +-> p5-Glib-Object-Introspection-0.051.tgz | +-> py3-gobject3-3.48.2p0.tgz | +-> libmypaint-1.6.1p1.tgz | +-> gimp-2.10.38.tgz Thanks and best regards.