GIMP Animation Package fails to build with latest 2.18?

In an attempt to move my photographic workflow over to nixpkg/NixOS, I’ve been sending the nix project patches to get everything up to date. All GIMP plugins are bundled together in one file in the nixpkg, so while I was trying to update the GMIC gimp plugin, the GAP plugin failed to build.

I don’t use this plugin and I don’t have any plans to use it, but was wondering if anyone has gotten this to compile lately. It seems it hasn’t been updated in some time.

Thanks!