For the case of a path such as /go you could bind mount this to /home/user/go or similar and use this as GOPATH for strict confinement. classic confinement for development tools is more suitable for tools which need to execute arbitrary binaries from the host etc as explained in Process for reviewing classic confinement snaps - if you feel that proaction does fit within the known categories for classic confinement can you please detail that here so we can understand these requirements?