The constant IDs got perturbed in
8c379c40.
vec3 ambient;
vec4 light_position;
};
-layout(constant_id=669465692) const bool use_light = true;
-layout(constant_id=1735871552) const bool use_ambient = true;
+layout(constant_id=669465691) const bool use_light = true;
+layout(constant_id=1735871551) const bool use_ambient = true;
layout(location=0) out vec4 frag_color;
layout(location=1) in vec3 world_normal;
layout(location=0) in vec4 world_vertex;