Without the change build fails on upstream gcc-10 as:
ld: ri_image/.libs/libRiImage.a(cp_jpeg.o):/build/libfpx-1.3.1-7/ri_image/../jpeg/ejpeg.h:35:
multiple definition of `No_JPEG_Header_Flag'; jpeg/.libs/libJpeg.a(enctile.o):/build/libfpx-1.3.1-7/jpeg/ejpeg.h:35: first defined here
He prefers to contribute to his own nixpkgs fork triton.
Since he is still marked as maintainer in many packages
this leaves the wrong impression he still maintains those.