Correct path for video_shader = on .cfg

I’m launching a game on RetroArch with --appendconfig and the video_shader = parameter has the wrong path. I know because the .cfg loads correctly and enabling the shader manually works too.

I’ve tried:

video_shader = ":/shaders_slang/handheld/lcd-grid.slangp"
video_shader_enable = "true"

and

video_shader = "~/Library/Application Support/RetroArch/shaders/shaders_slang/handheld/lcd-grid.slangp"
video_shader_enable = "true"

I know the .cfg is being loaded because if I add menu_driver = “rgui”, it does indeed change that.

edit: it turns out video_shader is deprecated per CFG file parameter video_shader = not working This kind of stuff really should be better documented, maybe throw in some warning in the log.