Ben says this might work.
@@ -5,7 +5,7 @@ env.make_derivation rec {
builder = ./builder.sh;
src = ../../../pkg/ge-additions;
- nativeBuildInputs = [ deps.ed25519 ];
+ cross_inputs = [ deps.ed25519 ];
CC = "${env.host}-gcc";
AR = "${env.host}-ar";
