Can someone take a look at this please?

[53/1508] cd /pobj/warzone2100-4.3.2/warzone2100/data/base/shaders/vk && /usr/local/bin/glslc -c /pobj/warzone2100-4.3.2/warzone2100/data/base/shaders/vk/button.frag -o /pobj/warzone2100-4.3.2/build-i386/data/base/shaders/vk/button.frag.spv
FAILED: data/base/shaders/vk/button.frag.spv /pobj/warzone2100-4.3.2/build-i386/data/base/shaders/vk/button.frag.spv 
cd /pobj/warzone2100-4.3.2/warzone2100/data/base/shaders/vk && /usr/local/bin/glslc -c /pobj/warzone2100-4.3.2/warzone2100/data/base/shaders/vk/button.frag -o /pobj/warzone2100-4.3.2/build-i386/data/base/shaders/vk/button.frag.spv
/bin/sh: /usr/local/bin/glslc: not found
ninja: build stopped: subcommand failed.

glslc is mentioned in the Makefile, where vulkan is disabled,
so maybe it makes sense to enable that too.