download 184.108.40.206-4 pkbuild from https://aur.archlinux.org/cgit/aur.git/snapshot/aur-82734e3b66d627b06b45fd20719e87d4a50a1081.tar.gz
Download gegl from main repo.
In PKGBUILD under build()
add LIBS="-lm", like below
ALL_LINGUAS=“en en_GB” ./configure LIBS="-lm" --prefix=/usr – …
so you wont get error, then $makepkg && pacman -U gimp-ligt …
brief backstory: Since last update (still older version of gimp) there was some undesirable behavior not seemed by previous ver. When paste a image into gimp, cut or delete selection will make the area being black instead of transparent like before. Well, it wasn’t impossible to solve, Layer > Transprancy > Alpha to Selection. Maybe I’m nitpicking, so that’s that.