Fixed ISO builds.

scripts/build-gamecube.sh

@@ -7,6 +7,7 @@ fi
 mkdir -p build-gamecube
 cmake -S. -Bbuild-gamecube \
   -DDUSK_TARGET_SYSTEM=gamecube \
+  -DDUSK_DOLPHIN_BUILD_TYPE=DOL \
   -DCMAKE_TOOLCHAIN_FILE="$DEVKITPRO/cmake/GameCube.cmake" \
   -DDKP_OGC_PLATFORM_LIBRARY=libogc2
 cd build-gamecube