Compiling Temp Shader Frag File Alongside shader file

[CLFrod]

I'm trying to use the glslc compiler with this extension since I'm using Vulkan, and I'm trying to get my compilation workflow setup.

The compilation doesn't work though.

I've tried without -c and it always says that it doesn't work with multiple files.

[03.1 14:49:28.692] Using external compiler 'C:\VulkanSDK\1.4.304.1\Bin\glslc.exe' with arguments '-c C:\Users\larry\source\repos\VulkanEngine\VulkanEngine\simple_shader.frag -o C:\Users\larry\source\repos\VulkanEngine\VulkanEngine\frag.spv' on temporal shader file 'C:\Users\larry\AppData\Local\Temp\shader.frag'
[03.1 14:49:28.704] Dumping shader log:
glslc: error: cannot specify -o when generating multiple output files

it still seems to try and compile this shader.frag file alongside my simple_shader.frag file.

Is there something else I'm supposed to do?

Thanks.